Yes, there is also the bug in Mode 1 (not sure about 0) that ATC assigns an arrival runway and the pilot goes right ahead and confirms it, with no user input. If you want to change runway, you have to ask (but I now can't, as per this thread:
viewtopic.php?f=8&t=2893
Dave M knows about this and said it'll be fixed in the next update.
I think until some definitive explanation comes from Dave, I am going to switch to Mode 2 after take-off. No point keeping to Mode 1 after that, given that the pilot acknowledges the landing runway automatically, I intermittently get this 'no climb instructions from ATC' problem,
and change arrival runway isn't working (and it did up until 2 or 3 weeks ago, which deepens the mystery! I can't suddenly have become more careless in that short time!).