Ok, the issue is that no-one can drop items with visitor perms, correct? So they pick up an important item of yours, and now they can't drop it. Now you could simply give them member perms so they can drop it, but if they are running, you would kill them before they do damage to your world. So I sniped a person who yoinked my sharp 4 fire aspect 2 netherite sword, and the netherite sword glitched out of existence. It didn't drop from them, it just deleted itself, since visitors aren't supposed to be able to drop items, and it was supposed to drop the sword. The same thing happened with my shulker box which stored all my riches. Please fix this so no-one loses their stuff again. Can give a more detailed report if I need to.