Is anyone else experiencing VSync issues?

[Gr3g]

I've been playing Armored Core 3 recently and, after a few of the latest updates to the Nightly branch, have noticed that my FPS locks to 40 whenever geometry is on-screen and VSync is active. Has anyone else experienced this?

[Gr3g]

I don't know why, but things seem to be back to normal.

[Gr3g]

VSync is broken again. It's definitely the updates.

[Gr3g]

After some experimenting it seems that the combination of a 4K resolution, enabling VSync, enabling the Speed Limiter, and using Vulkan are the source of this issue but I'm still not sure why. Can I get any feedback on this?

[Gr3g]

I've discovered setting emulation speed to 99.9% solves the issue, though I'm still not sure why I didn't need to do this until now.

[Gr3g]

Nevermind, the tearing is occurring at the top of the screen.