Semi-often to be problematic, VRChat often steals ALL cursor input from the system and does not restore it.
It cannot be restored by killing VRChat or restarting explorer.exe either.
Restarting mouse service also does not restore systems inputs.
The
only
way to restore inputs is to do a system restart.
This most often happens with Unity open in the background and occurs when alt-tabbing from VRChat. Most often occurs on world change on alt-tab.
I believe this bug is problematic enough to where release should be paused until solved.
Log attached.