Setting the same value with setLayoutProperty triggers render event

[DannyDelott]

mapbox-gl-js version:
0.51.0

browser:
Chrome

Background

My application subscribes to the map's render event for many reasons, eg: showing a spinner while the map renders tiles/layers.

I notice we get flickers of a spinner when calling setLayoutProperty on a layer and passing the same value that's already in the layer.

Steps to Trigger Behavior

1. Call setLayoutProperty on a known, visible layer
2. Set the visibility property to visible
3. Set the visibility property to visible again

Link to Demonstration

Click the "Test" button in this jsbin:
https://jsbin.com/faqupawuho/1/edit?console,output

Expected Behavior

Calling map.setLayoutProperty('some-layer', 'visibility', 'visible') when the layer is already visible should be a no-op.

Actual Behavior

Two render events fire (see console logs in the JSBin example)

[weiliang903]

same issue for me.
this.map.setPaintProperty(this._rainfallId, 'raster-opacity', visible ? 0.6 : 0);
it's working

[mourner]

This was likely fixed by #7459. I'll reopen if it's not the case.