I just found a small bug when you use the server console developed by Cloudron team. When you execute a command, the output of the command is duplicated although the command is just executed once.
Looks like the UI subscribes to socket.io twice sometimes. Investigating
Fixed in https://git.cloudron.io/cloudron/minecraft-app/-/commit/b6d198585b5f4497a8d24abe43eaeac9ad101ce5