A sequence made from a sequence actor component doesn't play audio in editor or in PIE when the child of another actor or track.

This was reported and tested in 4.22.3 (CL-7053642). This was reproduced in 4.23 (CL-7838574) and Main 4.24 (CL-7887407)

Steps to Reproduce
  1. Open the UE4 Editor and create a Blank template project with Starter Content
  2. Create an Actor BP and add an ActorSequence component
  3. Open the ActorSequence in Sequencer
  4. Add a track using the green track button and select the root object of the BP
  5. Grab an audio file from the content browser and drop it onto the selected root track in the sequence, it should create an audio track under than selected track (as a child)
  6. Play the Sequence in the Sequence Editor, notice there is no sound
  7. Start PIE, notice there is no sound either
  8. in the sequence drag the audio file from under the root track and get it out of the "owner" track entirely (or delete it and drag and drop a audio again with no track selected)

Results: Play the sequence, notice there's no sound. Start the game, notice there is sound but this only happens when audio is a child track (spatialized)

Expected: Audio plays in Editor when playing a Sequence from an ActorSequence component. Audio plays in game (and editor) when the track is spatialized (a child of another actor)

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ComponentTools - Sequencer
Affects Versions4.
Target Fix4.24
Fix Commit8288265
Main Commit8614014
Release Commit9552237
CreatedAug 8, 2019
ResolvedAug 25, 2019
UpdatedNov 15, 2019