All players were kicked out from a room sometimes


Hello, I'm running a chat room online, but sometimes (every several hours) all players got kicked out from the room, and were unable to join the room again.

If I changed the room name, they can join the new room. The old room would be freezed for minutes or hours until it can be joint again.

There is no errors, nor receiving any messages from fusion cloud when trying to reconnect.

What could be the possible reasons?