Controller doesn't get attached after configuration change

Whenever configuration change happens, router comes back with all of the controllers in the backstack, but none of them get attached. I've noticed that the controller flags attached and needsAttach are both false after the config change. I'm guessing that's why none of the controllers get attached.

I have a pretty similar setup as in the demo project, I just don't have a root controller.

I am not using any child controllers or anything like that. 1 activity with a router, and i'm just pushing some controllers onto there.

Reproduce the configuration change with one Activity, a Router, and pushed controllers, without child or root controllers. Inspect the restored backstack and the attached and needsAttach flags; the issue is done when the controllers are attached again after the configuration change.

Written by the indexing model from the issue text.