I have a 3 monitor setup, my leftmost monitor oriented vertically and the other 2 being horizontal. Whenever I launch any game in Fullscreen, being it exclusive or borderless, at some point the mouse will either flick my camera to the left at the next frame, or I will be spun around 180 degrees.

I tried changing mice to another logitech mouse, and then a Cooler Master mouse but behavior is the same. Tried it on a different device and it doesn't happen there.

I tried changing the polling rate to the minimum it would go (125hz) and it'll still happen.

I tried all other USB ports on my computer but it would behave the same.

I tried cleaning all the sensors on my mouse with water and a Q-tip, and then compressed air, but it would behave the same.

I tried cleaning my mousepad and scrubbing it to remove debris, but it would behave the same.

What tipped me off was that somewhere on a different forum I believe, they tried unplugging their drawing tablet that they had connected and that solved the issue.

I unplugged my other 2 monitors besides my primary and tried playing games and then there were no issues. I re-plugged my monitors, but closed out DisplayFusion and had the default Windows Taskbars setting in Windows 11 on, and there was no issue.

I'm wondering if there is some issue where when launching the game, is it somehow extending very slightly to my other monitors that're flanking it which would cause my mouse to spin out?

Attached the log file from DisplayFusion, any assistance would be greatly appreciated.

So I actually managed to resolve this by only having the following options enabled under Mouse Management:

"Allow the mouse wheel to scroll windows under the mouse cursor that are not in focus"

and

"Prevent mose cursor from snagging on unaligned left/right monitor edges"

Afterwards, I didn't see any wacky behavior with my mouse anymore. What I do notice though is that in Menus for games, it'll act as if it's getting stuck between monitors, where the mouse will jump between a invisible threshold, but it is just cosmetic, it doesn't hamper my activities now.

Thanks for the reply though!

I've also had this exact problem, for years now. I also have three monitors that are unaligned (different resolutions).

So I tried the obvious solutions by turning off 'Prevent mouse cursor from snagging on unaligned xxx', and adding the games to the compatability settings and disabling the sh*t out of it, but to no avail.

Only now, after the n:th google search, while playing a new game that was similarly afflicted, I found this post and tried turning off the 'Prevent mouse cursor from sticking in Sticky corners and ruining all fullscreen games with mouse controlled camera movement', and it seemed to solve the issue!
No longer will I have to close down DF to play games, just to forget to start it again and get my windows randomized!

Although I'm still not sure why preventing the mouse from sticking in corners would make the input jump like the mouse was moved approx. 10 cm instead, I'd also really like to not get stuck constantly when not playing games...
I'm still running 10.1.2 so I don't know if this has been added to the compatability options in the latest version ('Sticky corners, just for you!'), or if the Sticky corners implementation has been 'fixed' somehow.

The current implementation seems to work fine, but it should make an exception if the focused window...
* is fullscreen and borderless?
* has the mouse pointer limited to the window (not true for all games though)
...then let it stick/be.

FYI The two latest games that suffered badly from this were AssCreed Shadows and the new 007 First Light.

Just searched the change log and found this one for v12
Change: "Ignore wrapping, sticking, and snagging on for full screen windows" is now enabled by default for new installs
Sounds promizzzing. Need to sleep now.