Use of bugs in lobby! Dota2! Support doesn't work


Today, I played QIWI TEAM PLAY DOTA 2 FAST CUP tournament(link:
This is link on match page:
Players from opposite team used bug, when they could check in as opposite team, they wait for the end of timer and after this they go for their team and we had technical lose. And the button write to admine isn’t work!

This image of lobby(watch on Mazek1488 and the page of match where he must be)


This wasnt done on purpose. We didnt expect to get a technical victory, and in the next games we played fair. I apologize


But really, it’s better to fix this bug so that this does not happen in the future