False abandonment penalty in ranked.

I keep getting kicked from my ranked matches. It has an error code saying “false authentication.” It gives me -162 rp loss (I’m in diamond). This has happened to me three times now. It happened in my last match when I was in third place with 7 KP. I was supposed to be +138 rp. Instead I get kicked, lose out on 138 rp and go negative-162 rp because it says I abandoned the game. This is a huge issue for a ranked grinder like me. The last game when this happened both of my teammates got kicked with the same issue. It happened twice last night and once the night before. This issue makes me not want to play ranked ever again and that’s the only reason I play the game. Please help me fix this issue or reinstate my lost RP.