The BR422 has the same issue the BR425 has: when you activate SIFA the Q key does not work. You need to stand up and sit down again, then it works. Unlike the BR425, the HUD shows SIFA properly. I have seen the issue both with RRO and HRR
I am experiencing same issue. Only own RRO for me it seemed to only happen in services and not scenarios. Anyways its a pretty annoying thing when SIFA rings and you have to stand up before it Zwangsbremmsungs you and maybe also triggers a PZB emergency if you are unlucky enough in case you forget "the workaround" at the start
This has been a problem for a while before TSW2. I'm sure they're aware of it because Matt does the Q test on streams. It occurs on console versions too.
