WebEngine 5.13/5.14 rendering issues on Intel Iris Graphics card

Running an Angular 9 SPA web application in Qt (static pages loaded in WebEngine/WebView) does result in inconsistent rendering.

Attached examples (correct / wrong) with inconsistent rendering. These occur when clicking around the application but also when using ALT-TAB to switch between the application and for example windows explorer.

By default, GPU raster is set to off (can be noticed in Example 2/3).
Also, tested with both Qt 5.13.0 and Qt 5.14.1 and same issues appear,

Note also the 4K resolution that can also be a factor for the rendering issues (attached complete dxdiag for further investigations).

For debugging, we've used:

• Enabled Developer tools (no errors reported)
• QTWEBENGINE_CHROMIUM_FLAGS to enable-gpu-rasterization ( slight improvements - Example 4/5)
• disable-gpu Command-Line for Qt (did show significant improvements, issue seems solved)

As a workaround, is there any way we can detect graphic card capabilities so we can disable GPU in certain configurations (like the one presented).