All my rocks return to their original position after the sequence has played. Restore state is ticked off so unsure what is happening. They should be behind a wall where the player cannot see.
Solution: https://docs.unrealengine.com/en-US/AnimatingObjects/Sequencer/HowTo/WhenFinished/index.html
Make sure any tracks you want to keep their sequencer changes, have When Finished property set to Keep State.