Setting Attach Track to Keep State prevents actor from detaching in sequencer

Setting Attach Track to Keep State prevents actor from detaching in sequencer. The odd thing is if I set it back to Restore State or Project Default it continues to behave like this. In the attached video I believe i had previously set it to Keep State.

1. Open the Attached Project: [Link Removed]
2. Open the level sequence
3. Right click on the attach track on the sphere
4. Select Properties > When Finished > Keep State
5. Play the sequence

Result: Actor remains attached