Basically yesterday i was playing on a minehut server with a friend, i looted a dungeon, then a minute later the server crashed.
when i logged back a few hours later i found in my inventory the thing that i stole from the dungeon and also the same stuff in the dungeon chest, basically the server had a rollback of a few min, not sure about the time.
this could lead to a potential dupe, idk if the rollback was caused by a particular crash or if a rollback happens at every crash, but yeah, this can be exploited on many ways, duping is prob the main one.