Glitch in the multiplayer?

This is my second time experiencing on a multiplayer that 's fighting invisible enemies. I can't see them nor hit them but getting points for some of it. I was playing with another player and paying attention to the scores. I also realized that on te bottom right shows about the player killing the enemy and how. The way I'm observing things while I play, there are other players that are not visible on the multiplayer. And it's a good thing I'm only playing on the bronze level. Thank you for your time for listening to my problems and please get this fixed. I'm getting damaged by invisible enemies and knocked to the ground and don't even know where its coming from.