VCL Skia version flashes when maximized.

[Shrubster]

Attached is a demo in both FMX and VCL. When the demo starts (both sized at 800x800) there are no issues.

When maximised to my large 4k screen (to stress test) - both apps will recalculate the grid to fill the new area.

The VCL version will start flashing - roughly every second a blank frame gets drawn by the TSKPaint. The FMX does not do this.

I have attempted to determine what is different between the two - but the FMX and VCL units are essentially identical.

I understand that VCL performance will not be as good as the FMX version but this is sadly a show stopper for me.

Hopefully it is something silly I have done. Appreciate any advice.

SkiaTEST.zip