Hi there!
I have been using my workaround of using AsusMuxDgpu mode for a while now, and when 570.153.02 version of the drivers dropped, I thought that I would give this another try.
I switched back into Hybrid mode, and this issue still persists.
AsusMuxDgpu mode is only available on laptops that physically have the MUX chip installed, and so this workaround is not available on all Advanced Optimus laptops.
It has been six months now that this issue has been identified, and there has been very little feedback from nVidia on this issue.
I am available to give extra information on this issue, just please tell me what tests you would like me to run, and I will gladly do it.