have you tested this in all modes - fullscreen, windowed and borderless?
Shouldn't affect it, but knowing compatibility oddities, it might be worth testing out.
Can confirm. I have tried every combination of fullscreen/windowed/borderless, no effects.
This may or may not work for everyone, but it is worth a try. If this doesn't work, unfortunately there's no other way right now other than to complain to Microsoft/Apple/Linux about the issue.
To solve mouse spinning as said, do this:
MAKE SURE YOU CLICK APPLY FOR IT TO ACTUALLY WORK!This will completely stop your mouse spin acceleration.
VSync reduces tearing of the framerates, stablizing the display with your monitor. As seen before, disabling VSync may increase frame rate but you are also risking other random factors into the game (such as mouse spinning), I tried the same in TF2 and it fixes my mouse spinning in that game just enabling VSync. Make sure VSync is enabled (unchecked in the options for "disabled").
Downside: Input delay will occur, may vary for others. Frame rate is locked to 60 (?), this depends on your monitor and your GPU.
Another note, this may not work on certain resolution settings, try fullscreen and windowed before losing hope. Restart Blockland if you really need to.