[2021] Disconnect at the end of match

So I was playing ranked with my friend, and we just won a hard-fought victory match. But then in the last second of that match in a 4 v 1 situation, I disconnected, but then my team won the match without me. I am not intended to leave, but then i got mmr decrease and also ban for 30 minutes. Pls fix this and help people that disconnected because of their internet at the end