[Skyblock1] Bug

Your username: Pudding_McStubbs
In which minigame/server does the bug occur: Skyblock1
Detailed description of bug: In Skyblock1 on my island, I have a shop. Inside are chest shops and item frames above them showing what you're buying. Someone was asking who sold leather. I do. They teleported to me and so did a few other players. I go back to working on my iron golem farm, and I see that they bought a bunch of things. I go back into the shop and the things from the item frames are all on the floor around the shop. Then all of the players leave my island. They were never added, but they still removed the things from the item frames. I don't know how. Probably a bug. That's why I'm reporting here asuming it's a bug. Thank you for your time and I hope this gets fixed in the future.