If you’re using Team Create and you click “shut down all instances” on the game then your studio will also disconnect from Team Create. This is very annoying when I’m testing and need to shut down the game’s servers for the latest version.
I haven’t experienced any data loss yet, but it’ s certainly likely if you had modified something just before shutting down.
Simple repro:
Open any game in Team Create, go to the game’s page and Shutdown all instances, your studio will disconnect and then try to reconnect.