my right mouse button locks

So one day while walking through Dromuun Kaas as a sniper, I let go of my right mouse button and wouldn't get my left button back. when i tried walking again i'd move forwards then immediately pull out cover when i never told it to. I set all my controls to default and it fixed it, I logged out and when I came back the problem returned, deafaulting controls just didn't work then...

Now the backstory's done, I have one friend who also has this problem, and the issue carries over all my characters.

It's generally making the game... not fun as i have to click left about 20 times to unblock it, I then see my mouse switching between right click and neutral really fast without nan explanation.