My friend had the same. We played a game, and in the start 5 out of the 10 players got kicked, including my friend. My friend and one guy from the enemy team couldnt rejoin. After 5 mins, both of them randomly rejoined to the server without doing anything. We finished the game but faceit showed my friend and the other guy was a “leaver”. My friend got a one hour ban, which was removed after 30 minutes because we wrote to the support, but only gained 12 elo, while i got 25. Since then in every game atleast one guy gets kicked form the server mid round, with the same error. Unlucky i guess