So Saturday afternoon I fired up Blitz to play a few new songs, try to gold star a few new songs etc.
3 out of 8 songs played after finishing the song was greeted with the friendly message telling me my score didn't count, I wouldn't get coins etc etc. lol
Only one of the 3 was a new gold star run and I got a better score on my second run.
Sometimes you know when you are disconnected because the meter that shows you vs your rival is missing. I never seem to notice exactly when this happens, I am pretty sure it has disappeared mid-song for me but maybe it doesn't show up at the start on those occasions.
I have plenty of coins so not getting the coins for the end of the song doesn't bother me, but it sucks to lose a good score because off ill behaved hardware on the other end.