In the event of a problem in socketio_client, the log messages are discarded, with the logging layer emitting one notice to indicate that this has happened:

No handlers could be found for logger "socketIO_client"

When a logger was added for T85717 , we see that the problem was a critical disconnection, with an informative message:

WARNING:socketIO_client:[connection error] connection closed ()

I'm not sure that adding a socketIO_client" logger is the right thing to do. Ideally, pywikibot is catching exceptions and these messages are logged using the "pywiki-rcstream" logger. But we need logging soon, if we're to diagnose problems that occur.

As pywikibot is not currently catching this exception (which I believe is coming from websocket), we need to investigate that. Communication of important connection status changes might be happening via other mechanisms, like the generic handlers or by callbacks.