I got kicked from a ranked match during the end game

I was in the end game with my duo and a random and for no reason at all the game boots me to the title screen and said that I had been inactive/ afk when I was actively moving and when I tried to rejoin it would not let me and sent me back to the lobby gave me a 10 min penalty and dropped me 76 rp when I was positive for the game and left my team down one in the end game can someone help me get this resolved in some way