Full disclosure - the “reconnect” button is as it sounds - it assumes that there was some sort of disconnection it couldn’t recover from but your credentials are still valid.
If it doesn’t work, then it’s a “ real disconnect” where Amazon has said your now logged out - please log back in.
I was just testing with the reconnect - Phil do you mean to say that the reconnect button fails … but then simply restarting homey or the app and your automatically reconnected?