Reporting a bug on flex ranked

I got a bug when i entered in the game as thresh and couldnt go bot, only mid straight to their base. In the minimap the line , the white (movement)line had its last destination at the enemy base. SO I log out hoping that i would get the bug away, went afk(normally) and my team remake, I lost LP and got ban in loot, unable to win keys etc.. So please do smth about this bug.Thank you.