Mouse goes off the game screen even in Fullscreen (FiveM)

Hello,

I am reaching out to you because I am totally desperate.

A year ago, I was regularly playing on GTA RP (thus FiveM) and I should point out that I had no issues.
After a long break (uninstalling the game, FiveM, etc...) and returning a few days ago, I reinstalled everything and that's when the problem started.

To explain, I play on my right screen. My left screen serves me for Discord / other apps.

Having reinstalled everything a few days ago, I realize there's a big problem. When I'm in-game, if I move my mouse to the left (toward my second screen), my mouse goes out of the game (my camera continues to turn based on mouse movements in-game even when moving the mouse on the second screen).
This happens whether I am in Full Screen / Full Screen (Exclusive) / Windowed.
And this is extremely annoying since I can end up clicking outside the screen, which can cause issues.

I've tried everything. Moreover, after discussing with people who tried to help me, the following settings do not solve the problem in question. For example, in the Keyboard/Mouse tab, there is an option "Input Mode".

• If I’m in Raw Input, the mouse goes out of the game and the camera movements continue even when moving the mouse on my other screen.
• If I'm in Direct Input, the mouse also exits the screen BUT the camera stops turning as soon as it goes to the second screen.
• If I'm in Windows, then the mouse no longer goes out BUT if I open the phone in-game, the mouse is completely bugged and stays "stuck" in the center of the screen and I cannot use it, since the mode on this server requires using the mouse to interact with the phone...

I find myself blocked or bothered NO MATTER the display mode or the mouse input mode.
I don't know what else to test as a solution, knowing that this problem simply didn't exist back then...
From what I've noticed, this seems to happen ONLY on FiveM and not on other games...

I remain attentive to your responses.
I hope there is a solution other than installing a third-party software to lock the mouse to one screen or disabling one... It would be strange if this problem didn't have a traditional solution...

Best regards.