This has happened to me a few times. When accessing files hosted by FMS latest version via my iPad fm go 12, when I choose, after tapping the window symbol in the upper left corner, "close all", fm go hangs and doesn't appear to close the windows/files. To actually disconnect I must use the admin console to disconnect clients! This is over the WAN by the way. Stable connection apparently. Accessing the files is fine. Closing them nit so.