diff --git a/src/components/ReportActionItem/TaskPreview.js b/src/components/ReportActionItem/TaskPreview.js
index 740ab345fa74..d05ebd4bfd09 100644
--- a/src/components/ReportActionItem/TaskPreview.js
+++ b/src/components/ReportActionItem/TaskPreview.js
@@ -88,9 +88,9 @@ function TaskPreview(props) {
                         disabled={ReportUtils.isCanceledTaskReport(props.taskReport)}
                         onPress={() => {
                             if (isTaskCompleted) {
-                                Task.reopenTask(props.taskReportID, taskTitle);
+                                Task.reopenTask(props.taskReport, taskTitle);
                             } else {
-                                Task.completeTask(props.taskReportID, taskTitle);
+                                Task.completeTask(props.taskReport, taskTitle);
                             }
                         }}
                         accessibilityLabel={props.translate('task.task')}
diff --git a/src/components/ReportActionItem/TaskView.js b/src/components/ReportActionItem/TaskView.js
index 7fd04d8544c7..83c15acee79f 100644
--- a/src/components/ReportActionItem/TaskView.js
+++ b/src/components/ReportActionItem/TaskView.js
@@ -79,7 +79,7 @@ function TaskView(props) {
                                     <Text style={styles.taskTitleDescription}>{props.translate('task.title')}</Text>
                                     <View style={[styles.flexRow, styles.alignItemsTop, styles.flex1]}>
                                         <Checkbox
-                                            onPress={() => (isCompleted ? Task.reopenTask(props.report.reportID, taskTitle) : Task.completeTask(props.report.reportID, taskTitle))}
+                                            onPress={() => (isCompleted ? Task.reopenTask(props.report, taskTitle) : Task.completeTask(props.report, taskTitle))}
                                             isChecked={isCompleted}
                                             style={styles.taskMenuItemCheckbox}
                                             containerSize={24}
diff --git a/src/components/TaskHeaderActionButton.js b/src/components/TaskHeaderActionButton.js
index e0a2549b2f0c..148cf81ce672 100644
--- a/src/components/TaskHeaderActionButton.js
+++ b/src/components/TaskHeaderActionButton.js
@@ -50,9 +50,7 @@ function TaskHeaderActionButton(props) {
                     medium
                     text={props.translate(ReportUtils.isCompletedTaskReport(props.report) ? 'task.markAsIncomplete' : 'task.markAsDone')}
                     onPress={() =>
-                        ReportUtils.isCompletedTaskReport(props.report)
-                            ? Task.reopenTask(props.report.reportID, props.report.reportName)
-                            : Task.completeTask(props.report.reportID, props.report.reportName)
+                        ReportUtils.isCompletedTaskReport(props.report) ? Task.reopenTask(props.report, props.report.reportName) : Task.completeTask(props.report, props.report.reportName)
                     }
                     style={[styles.flex1]}
                 />
diff --git a/src/libs/ReportActionsUtils.js b/src/libs/ReportActionsUtils.js
index 3cd5621e5e32..6d777533360d 100644
--- a/src/libs/ReportActionsUtils.js
+++ b/src/libs/ReportActionsUtils.js
@@ -119,6 +119,17 @@ function getParentReportAction(report, allReportActionsParam = undefined) {
     return lodashGet(allReportActionsParam || allReportActions, [report.parentReportID, report.parentReportActionID], {});
 }
 
+/**
+ * Find the reportAction having the given childReportID in parent report actions
+ *
+ * @param {String} childReportID
+ * @param {String} parentReportID
+ * @returns {Object}
+ */
+function getParentReportActionInReport(childReportID, parentReportID) {
+    return _.find(allReportActions[parentReportID], (reportAction) => reportAction && `${reportAction.childReportID}` === `${childReportID}`);
+}
+
 /**
  * Determines if the given report action is sent money report action by checking for 'pay' type and presence of IOUDetails object.
  *
@@ -583,6 +594,7 @@ export {
     getReportPreviewAction,
     isCreatedTaskReportAction,
     getParentReportAction,
+    getParentReportActionInReport,
     isTransactionThread,
     getFormattedAmount,
     isSentMoneyReportAction,
diff --git a/src/libs/ReportUtils.js b/src/libs/ReportUtils.js
index 3fd1236e26ae..e3b6cb2ccc52 100644
--- a/src/libs/ReportUtils.js
+++ b/src/libs/ReportUtils.js
@@ -1592,24 +1592,26 @@ function updateOptimisticParentReportAction(parentReportAction, lastVisibleActio
  * @param {String} reportID The reportID of the report that is updated
  * @param {String} lastVisibleActionCreated Last visible action created of the child report
  * @param {String} type The type of action in the child report
+ * @param {String} parentReportID Custom reportID to be updated
+ * @param {String} parentReportActionID Custom reportActionID to be updated
  * @returns {Object}
  */
-const getOptimisticDataForParentReportAction = (reportID, lastVisibleActionCreated, type) => {
+function getOptimisticDataForParentReportAction(reportID, lastVisibleActionCreated, type, parentReportID = '', parentReportActionID = '') {
     const report = getReport(reportID);
-    if (report && report.parentReportActionID) {
-        const parentReportAction = ReportActionsUtils.getParentReportAction(report);
-        if (parentReportAction && parentReportAction.reportActionID) {
-            return {
-                onyxMethod: Onyx.METHOD.MERGE,
-                key: `${ONYXKEYS.COLLECTION.REPORT_ACTIONS}${report.parentReportID}`,
-                value: {
-                    [parentReportAction.reportActionID]: updateOptimisticParentReportAction(parentReportAction, lastVisibleActionCreated, type),
-                },
-            };
-        }
+    const parentReportAction = ReportActionsUtils.getParentReportAction(report);
+    if (_.isEmpty(parentReportAction)) {
+        return {};
     }
-    return {};
-};
+
+    const optimisticParentReportAction = updateOptimisticParentReportAction(parentReportAction, lastVisibleActionCreated, type);
+    return {
+        onyxMethod: Onyx.METHOD.MERGE,
+        key: `${ONYXKEYS.COLLECTION.REPORT_ACTIONS}${parentReportID || report.parentReportID}`,
+        value: {
+            [parentReportActionID || report.parentReportActionID]: optimisticParentReportAction,
+        },
+    };
+}
 
 /**
  * Builds an optimistic reportAction for the parent report when a task is created
@@ -2788,6 +2790,30 @@ function getParentReport(report) {
     return lodashGet(allReports, `${ONYXKEYS.COLLECTION.REPORT}${report.parentReportID}`, {});
 }
 
+/**
+ * Find the parent report action in assignee report for a task report
+ * Returns an empty object if assignee report is the same as the share destination report
+ *
+ * @param {Object} taskReport
+ * @returns {Object}
+ */
+function getTaskParentReportActionIDInAssigneeReport(taskReport) {
+    const assigneeChatReportID = lodashGet(getChatByParticipants(isTaskAssignee(taskReport) ? [taskReport.ownerAccountID] : [taskReport.managerID]), 'reportID');
+    if (!assigneeChatReportID || assigneeChatReportID === taskReport.parentReportID) {
+        return {};
+    }
+
+    const clonedParentReportActionID = lodashGet(ReportActionsUtils.getParentReportActionInReport(taskReport.reportID, assigneeChatReportID), 'reportActionID');
+    if (!clonedParentReportActionID) {
+        return {};
+    }
+
+    return {
+        reportID: assigneeChatReportID,
+        reportActionID: clonedParentReportActionID,
+    };
+}
+
 /**
  * Return true if the composer should be hidden
  * @param {Object} report
@@ -2969,6 +2995,7 @@ export {
     getMoneyRequestAction,
     getBankAccountRoute,
     getParentReport,
+    getTaskParentReportActionIDInAssigneeReport,
     getReportPreviewMessage,
     shouldHideComposer,
     getOriginalReportID,
diff --git a/src/libs/actions/Task.js b/src/libs/actions/Task.js
index 36eabd05cece..5cb186415406 100644
--- a/src/libs/actions/Task.js
+++ b/src/libs/actions/Task.js
@@ -213,7 +213,13 @@ function createTaskAndNavigate(parentReportID, title, description, assignee, ass
     Navigation.dismissModal(optimisticTaskReport.reportID);
 }
 
-function completeTask(taskReportID, taskTitle) {
+/**
+ * Complete a task
+ * @param {Object} taskReport task report
+ * @param {String} taskTitle Title of the task
+ */
+function completeTask(taskReport, taskTitle) {
+    const taskReportID = taskReport.reportID;
     const message = `completed task: ${taskTitle}`;
     const completedTaskReportAction = ReportUtils.buildOptimisticTaskReportAction(taskReportID, CONST.REPORT.ACTIONS.TYPE.TASKCOMPLETED, message);
 
@@ -266,9 +272,25 @@ function completeTask(taskReportID, taskTitle) {
     ];
 
     // Update optimistic data for parent report action
-    const optimisticParentReportData = ReportUtils.getOptimisticDataForParentReportAction(taskReportID, completedTaskReportAction.created, CONST.RED_BRICK_ROAD_PENDING_ACTION.ADD);
-    if (!_.isEmpty(optimisticParentReportData)) {
-        optimisticData.push(optimisticParentReportData);
+    const optimisticDataForParentReportAction = ReportUtils.getOptimisticDataForParentReportAction(taskReportID, completedTaskReportAction.created, CONST.RED_BRICK_ROAD_PENDING_ACTION.ADD);
+    if (!_.isEmpty(optimisticDataForParentReportAction)) {
+        optimisticData.push(optimisticDataForParentReportAction);
+    }
+
+    // Multiple report actions can link to the same child. Both share destination (task parent) and assignee report link to the same report action.
+    // We need to find and update the other parent report action (in assignee report). More info https://github.com/Expensify/App/issues/23920#issuecomment-1663092717
+    const assigneeReportAction = ReportUtils.getTaskParentReportActionIDInAssigneeReport(taskReport);
+    if (!_.isEmpty(assigneeReportAction)) {
+        const optimisticDataForClonedParentReportAction = ReportUtils.getOptimisticDataForParentReportAction(
+            taskReportID,
+            completedTaskReportAction.created,
+            CONST.RED_BRICK_ROAD_PENDING_ACTION.ADD,
+            assigneeReportAction.reportID,
+            assigneeReportAction.reportActionID,
+        );
+        if (!_.isEmpty(optimisticDataForClonedParentReportAction)) {
+            optimisticData.push(optimisticDataForClonedParentReportAction);
+        }
     }
 
     API.write(
@@ -282,11 +304,12 @@ function completeTask(taskReportID, taskTitle) {
 }
 
 /**
- * Reopens a closed task
- * @param {string} taskReportID ReportID of the task
- * @param {string} taskTitle Title of the task
+ * Reopen a closed task
+ * @param {Object} taskReport task report
+ * @param {String} taskTitle Title of the task
  */
-function reopenTask(taskReportID, taskTitle) {
+function reopenTask(taskReport, taskTitle) {
+    const taskReportID = taskReport.reportID;
     const message = `reopened task: ${taskTitle}`;
     const reopenedTaskReportAction = ReportUtils.buildOptimisticTaskReportAction(taskReportID, CONST.REPORT.ACTIONS.TYPE.TASKREOPENED, message);
 
@@ -342,9 +365,25 @@ function reopenTask(taskReportID, taskTitle) {
     ];
 
     // Update optimistic data for parent report action
-    const optimisticParentReportData = ReportUtils.getOptimisticDataForParentReportAction(taskReportID, reopenedTaskReportAction.created, CONST.RED_BRICK_ROAD_PENDING_ACTION.ADD);
-    if (!_.isEmpty(optimisticParentReportData)) {
-        optimisticData.push(optimisticParentReportData);
+    const optimisticDataForParentReportAction = ReportUtils.getOptimisticDataForParentReportAction(taskReportID, reopenedTaskReportAction.created, CONST.RED_BRICK_ROAD_PENDING_ACTION.ADD);
+    if (!_.isEmpty(optimisticDataForParentReportAction)) {
+        optimisticData.push(optimisticDataForParentReportAction);
+    }
+
+    // Multiple report actions can link to the same child. Both share destination (task parent) and assignee report link to the same report action.
+    // We need to find and update the other parent report action (in assignee report). More info https://github.com/Expensify/App/issues/23920#issuecomment-1663092717
+    const assigneeReportAction = ReportUtils.getTaskParentReportActionIDInAssigneeReport(taskReport);
+    if (!_.isEmpty(assigneeReportAction)) {
+        const optimisticDataForClonedParentReportAction = ReportUtils.getOptimisticDataForParentReportAction(
+            taskReportID,
+            reopenedTaskReportAction.created,
+            CONST.RED_BRICK_ROAD_PENDING_ACTION.ADD,
+            assigneeReportAction.reportID,
+            assigneeReportAction.reportActionID,
+        );
+        if (!_.isEmpty(optimisticDataForClonedParentReportAction)) {
+            optimisticData.push(optimisticDataForClonedParentReportAction);
+        }
     }
 
     API.write(
diff --git a/src/pages/home/HeaderView.js b/src/pages/home/HeaderView.js
index 85cdd239dae7..fafd6caf4f1f 100644
--- a/src/pages/home/HeaderView.js
+++ b/src/pages/home/HeaderView.js
@@ -104,7 +104,7 @@ function HeaderView(props) {
             threeDotMenuItems.push({
                 icon: Expensicons.Checkmark,
                 text: props.translate('task.markAsDone'),
-                onSelected: () => Task.completeTask(props.report.reportID, title),
+                onSelected: () => Task.completeTask(props.report, title),
             });
         }
 
@@ -113,7 +113,7 @@ function HeaderView(props) {
             threeDotMenuItems.push({
                 icon: Expensicons.Checkmark,
                 text: props.translate('task.markAsIncomplete'),
-                onSelected: () => Task.reopenTask(props.report.reportID, title),
+                onSelected: () => Task.reopenTask(props.report, title),
             });
         }