Incorrect behaviour of validation of inputs with default values

[sgauruseu]

1. Create the double 2-4. Set default value to 0

 <input name="double" type="Double">
      <label>Double</label>
      <indexed>true</indexed>
      <custom-text>Custom text</custom-text>
      <occurrences minimum="2" maximum="4"/>
      <default>0</default>

      <help-text>required 2</help-text>
    </input>

2. Open wizard for new double 2-4
3. Fill in the name input and save
4. Click on Add button, 3 inputs with 0 value are displayed now. (Do not save the content).
5. Click on remove icon and remove the top input

BUG: Content gest not valid after deleting this input. Validation message appears

The same issue in Long 2-4 content (3 is default value in this long input)