To clarify, vsync broke after patch 29.8.0, only on Directx 12, on Directx 11 vsync works stably at 60 fps, advice don't play on Directx 12 this is the worst API and it's broken, the beta justifies it so far. P.S. I hope someday to see in this game, the implementation of the Vulkan api, this API is better.
I hope this week a patch will be released that fixes the worst optimization of this patch 29.8.0 and the vsync fix when enabled shows 30 fps instead of stable 60, or you should at least roll back the optimization changes to the previous state. Sorry for my english.