also, I got another one the enemies can fall out of the arena and you can also push them out and then they don't spawn anymore because I think they really never die so they never respawn back to the correct spot so there is no enemies until you go into the main menu and press play again although it isn't really a bug more a problem I just wanted to let you know. ( you can just add a little wall, players have to parkour over to enter the arena so you have to scale the wall to enter its just the easiest way to fix it).