Just to add one thing. It is really tough to debug this, because every time I try to use the Metal Debugger to capture the frame state my app crashes and I get the following message: [GPUDebug] Null texture access executing kernel function "ColorCorrection" encoder: "Keyframing.SurfaceWarpFuser.InverseWarpKeyframe", dispatch: 2 Message from debugger: Terminated due to signal 9

Yes... I have shader validation enabled. Did a little more digging. too. It seems to be being caused by a Compute function I am using (non-graphic rendering), which would seem to added to your theory it is an issue outside of my code. I will fill out report. Stan

Just to add. I have turned off all my shaders and Kernels. So when draw() fires nothing happens in my app. And I still see the error pop up in my console. I have added a report to Feedback Assistant.