Every time I start up a room (for example: bedroom), my cursor is going in and out along the frame (edge) of my screen. I am able to see it whenever I turn in a certain direction. Sometimes when this issue occurs, I have no mouse control whatsoever. I have to hold right click or left click in order to be able to turn my screen. I'm not sure if others have encountered this problem, but if you have and you found out how to fix it, please let me know. This has been messing up my any% runs a lot since you can't pause in survival mode.

You should try to launch the game on fullscreen, but I also get this issue of having to stay on right click for the mouse cursor to move, and I have not found any working solution except holding right click.

I had this problem too, and this was why when I set the window mode on "Windowed Fullscreen". I had to turn back to "Fullscreen" mode in order to solve this problem

It ended up working! It's temporary, but it gets the job done. Thanks!

Me I noticed another cursor bug : when you play attic, and you leave it by the pause menu, selecting a level will be harder as the game will have trouble detecting the left click. It's only when I leave attic level like that I have this problem

Okay, I know it's been a year, but I have a theory on why the cursor glitch could happen. Basically whenever you enter a level while holding left click (i.e office after staying on the pause button for foxy or freddy), the game must glitch and only detect the mouse when it is under the same conditions as you entered the level, which is holding left or right click. This needs more testing mostly on survival mode because I can't reproduce the glitch consistently elsewhere.