Comment 17 for bug 615239

any update on this?

This is quite annoying especially on phone devices.
When you leave a WiFi an NM tries to reconnect and fails because it's too far, it treats that as an auth error, that prompts a UI dialog on your phone, asking for WiFi password.

That's already not ideal, but there's more: since it failed connecting, NM won't reconnect to that WiFi again when you go back into the same WiFi area, unless you explicitly ask it to...