We're incredibly sorry for the delayed response. Kit PvP, OP PvP, Infection, Skywars and Parkour are 1.8.8 Creative, Survival and Skyblock are 1.12.2 You are most likely experiencing a visual glitch because you're on a client above 1.12 yes. You should still be able to walk through them though. Either way this is undoubtedly a ViaVersion issue and there's nothing we can really do about it other than updating the gamemodes. This thread has been moved to Reports - Archives.
