Battlefield 1 Bug

I'm on pc

My mouse isn't working in multiplayer, it can only move up and down. In the campaign and the intro everything work correctly. In the menus too. Only buging in multiplayer.

No i don't have a controller plugged in

Yes my mouse is in perfect condition as it work as attended in campaign and any other game. It's a BF1 multiplayer issues.

Please help me I'm gonna hang myself soon. 2h in and nothing work.

What I already tried : verifying files via steam, uninstalling reinstalling, deleting cache and temporary files for BF1 in my computer documents files.

I just don't know what I'm supposed to do.