Locking mouse cursor to game window

TheHolliwood​ Multiple (3) monitors here as well, running the game in Borderless Window Mode, and the cursor locks to the game when clicking on it 🤔

Do you have any custom resolution software running by any chance? Or anything that could influence this behaviour?

I've noticed this behavior as well. Full Screen. Happens when holding either left or right mouse click. Doesn't happen all the time. The only Resolution software I run is biglittlemouse on github.

encountering this issue as well, EXTREMELY frustrating. I have 3840x1080 monitor and another one above it, the game will not lock my cursor even in fullscreen and will alt tab when trying to aim, shoot or spot targets.

Its when you have another fullscreen application, i didnt realize that i had Batman Arkham Knight still running while playing but after closing and relaunching the game its fixed 

Same issue here, the single most frustrating thing I've ever experienced whilst gaming. Fully killing Little Big Mouse has fixed it so that must be the issue.  Not sure if there is a workaround or way to disable it when it detects an executable is running?

EA_Leeuw​ I posted this before we were able to actually play and only had the main menu to go of on. I do not have any software running that would influence that. I do have windows' scaling set to 125% on my 1440p monitor and 100% on my 1080p one. Wouldn't be the first time that that is breaking stuff...

Now after actually playing, yes the mouse is confined to the game window while in a match, but it's still possible to leave it, e.g. when you use and hold (standard Key) Q for the quick response wheel.