I am also experiencing the same issue with the A350. The aforementioned ANN LT switch workaround did not work for me, however I did notice that if you switch off the crew supply oxygen for example, hit ESC to the pause menu and ESC again to unpause, the status indicator light then updates and shows OFF. Also running in SU3, tried the whole delete WASM rigmarole and having only the A350 in the community folder but nothing seemed to fix this issue.