Friends unable to loot anything

Hi there, I’m loving the game but whenever I invite and play with my mates they get kicked when ever there’s a gun fight. Also the square button is missing for them so there unable to open ammo boxes, talk to NPC’s or loot any gear.
It’s fine when they join other friends and when I join them so I’m totally confused as to why it happens when anyone joins my game.
I’ve tried all settings and even reinstalling but still same problem. Anyone else having this issue? I’m on PS4 btw