I'd like to report a bug in the current version (including latest beta, and all previous versions of the past few months) of SteamVR related to timing incompatibilities with AMD 7000 series GPUs (7900 XTX w/ Vive Pro 1 in my case). This appears to be similar to a bug that was fixed for NVIDIA 4000 series cards as well, specifically in this update: https://store.steampowered.com/news/app/250820/view/3666530992740504707 (Beta 1.25.4).
Yes headsets don’t support VRR which is why it’s so crucial to get the timing right