Comment 11 for bug 2020849

I guess this is because race condition.

When one controller is restarted, the other controller gets presence request and run presence response.

presence response run UpdateServer() which update current status in Presence.

but as you can see juju status when one controller is restarted, shortly it shows us down or agent lost and getting back to normal.

While doing that, if presense response runs quickly before the status settle down. then it update Presence as down or agent lost.

This is assumption so I would appreciate if someone in juju team can confirm this.