I just logged into the server and spawned in my homeroom, and then I noticed that all of my diamonds and ingots are all gone from my 2 shulker boxes. I have 9 stacks of 64 diamonds, 10 diamonds, 7 stacks of 64 iron ingots, 39 iron ingots, and 43 gold ingots. All of them were stolen, and I only have 2 stacks of 64 iron ingots remaining in my inventory.