OpenGLContext issues on MacOs Catelina

Hi, I’m seeing issues in my app with OpenGLContext rendering on MacOS Catelina (no issues on older machine running High Sierra). I’ve tested it both on Retina and external non-retina monitor. The performance in general is worse and resizing of the window causes shaking of all content. The shaking gets significantly worse as the rendering load increases.

Here’s a gif of the DemoRunner showing the same behaviour. Code is latest develop. Xcode is 12.4.