Here is the flashing video. It only does it when scrolling.
Here are the overblown HDR videos screenshots:
I have already reset Windows to factory with no user data. I have installed the latest Intel & Nvidia drivers. I have then reinstall the drivers provided on Acer's website. All the same. I have tried it with MS Edge and Google Chrome. Makes no difference (Firefox doesn't support HDR)
What I have found out is that the flashing will stop when going to the BIOS and setting it to the dGPU. Leave me to think there is an issue with BIOS Mux Switching microcode.
But I haven't been able to fix the issue with the over blown videos.