Players, drops, mobs only visable for 1st player

1st player can see game normaly. All other players cant see mobs, drops, or 1st player. All they can see is normal world placed items , splash effects and movement foot print effect. Cant see 1st player on fire, potion effect bubbles or anything. Only time 1st player visable is death animation on their side flashing red b4 disapearing with the smk cloud.