While flying in multiplayer on 2.1, I sometimes get the bug where my HUD is sideways or angled weirdly and my HSI shows that i am at a 10+/- pitch while straight and level. Because of this when I engage altitude hold, the aircraft violently pitches causing a blackout or stall (depending on the error).
I had encountered this error a few months ago on 1.5 but I was under the impression that it had been fixed.
This does not happen every time, but it happens enough to become annoying.
Is there something I am doing wrong during the startup procedure to cause this error?