Comment 6 for bug 1878333

/etc/init.d/apparmor stop cannot and should not invoke aa-teardown. Such a stop mechanism was the source of many problems and the reason stop was switch to a no-opin /etc/init.d/apparmor and teardown was added.

Unfortunately systemd implements restart as stop followed by start. This a very poor fit for apparmor as once the security state is torn down you have to restart all services or in some cases the entire system.

Admittedly the current situation is less than ideal, there are WI scheduled to help better address this but atm the stop behavior is deliberate as on a whole it causes less problems than using teardown.