A number of times now playing GRB, in the middle of the battle while driving a ground vehicle I’ve found my left mouse button no longer fires the main gun - even though I did nothing to change the key-binds.
Most recent occurrence was driving my 2nd vehicle ( Pvkv m/43) on Fire Arc (ugh). Had no issues on 1st vehicle. then wen O spawned my 2nd and tried spacebar to clear shrubs with mg nothing happened. Pressed left mouse button and it fired mg.
So I went to Control screen and looked at bindings. It showed left Mouse as main and mg as spacebar. Nothing I could do fixed it. Then I died and respawned in 3rd tank - everything fine.
Anyone encounter spontaneous messing up of key-bindings mid-battle?