This is weird, never heard of anything like that. Could you replicate it and provide some footage of this? It could be that someone locked your chests (I think it would be punishable as trolling), but we could really say that if we saw the message
Thanks Expipiplusone, what I forgot to mention was that the locks on the chests wore off after a couple seconds, so it wasn't permanent.
Could it be that someone was trolling you with /vanish, then locked and unlocked the chests in a brief time? I don't know whether locks and unlocks are logged, but it's worth a try - I have investigator, /msg me ingame when you're online
Thanks for the help, but i'm going to msg the owners of DiamondBay first to see if I can find some answers.
You must have used all your locks as a builder I think you only get 10 locks. When you rank up you get a bunch more.
If it happens again look for transparent silver particles around you. If you find it someone's trolling you.