Hello,
Thanks for reporting this issue. I was unable to find any known issues with VSMs and HWRT in 5.5 and it sounds like a driver issue based on your description. If the issue is limited to specific drivers and hardware, I recommend that you add the driver to your AMD DriverDenyList, or use a DeviceProfileFragment to override the cvars used for that hardware. Hope that helps and please let me know if you have additional questions.