Disconnect issue

I can't seem to figure out how should I handle a disconnect case, my bot keeps disconnecting from time to time (either the irc network issue, or something on my end), the on_disconnect event doesn't get fired. Much obliged for a snippet.

No source file or test is named in the issue. Start by reproducing a bot disconnect and tracing how the on_disconnect event is expected to be delivered for IRC network or local connection failures. Done means the disconnect case is reliably observable and the handling guidance or behavior is covered by a reproducible test.

Written by the indexing model from the issue text.