Props falling through ground [HELP]

Well this happens randomly I really dont know what causes it but it happens and everything goes down from guns to money printers and props etc any help??

Sounds like your physbox keeps breaking, does it affect every prop you’ve placed or only a few?

all props ( its a RP server )

It’s a collision hook breaking the physics engine. To fix it, remove the collision hook (Either EntityShouldCollide or gm_guardian)

where can I find the collision hook?