Players & Teams feedback Megathread

I was playing fut Champions weekend league and came up against a team where they have a nearly invisible player. This made him nearly impossible to track and gave the opponent a huge unfair advantage. I lost the game because of this, and I feel like I deserve a replay or some form of compensation because it was a close game if it weren't for this issue. This should really not be happening in a game this popular and in such an important league where you only get 15 games.