Get follower experience while they are inactive.

Earlier today I got Harrison Jones and deactivated my Ahm to make room for him, who was attached to my enchanting building. Just a moment ago I looted work orders from my enchanting building (which no longer has Ahm working at it) and Ahm still gained experience.

Steps:

1. Have follower attached to a profession building
2. Deactivate this follower from the mission table
3. Loot work orders from profession building
4. Follower gained experience