Steps to reproduce:
1. Open Jitsi and auto-connect to an XMPP account
2. Disconnect from wifi
Jitsi still thinks I'm connected.
3. Reconnect to wifi
Jitsi thinks I'm connected, but it doesn't work. I have to disable the account and re-enable it to reconnect.
(As a sidenote, I'm trying to figure out steps to reproduce a bug that I've noticed in the past where my buddy list gets lots of duplicate buddies on and everything seems broken -- not sure how to reproduce that one though.)