The no banner bug does exist, but considering the M feature was being used here to report teamwounding and 4 prior bans on record for teamkilling or teamwounding, I'm going to issue a 12 hour ban.
This is a light ban because it could've legitimately been no banner bug, but you should've been sensible once M reports came in and there is a history for this. Stay out of trouble or bans might be getting much longer in the future.