I was able to reproduce the issue with the version of apparmor-utils and python3-apparmor from trusty-updates, 2.8.95~2430-0ubuntu5.1, and can confirm that the version of each in trusty-proposed, 2.8.95~2430-0ubuntu5.2, fixes the issue. Marking verification-done.
I was able to reproduce the issue with the version of apparmor-utils and python3-apparmor from trusty-updates, 2.8.95~ 2430-0ubuntu5. 1, and can confirm that the version of each in trusty-proposed, 2.8.95~ 2430-0ubuntu5. 2, fixes the issue. Marking verification-done.