Timelines in ActorBPs no longer work in projects packaged with BP nativization. Timelines in LevelBPs still work.
Confirmed in 4.23 MAIN @ CL 5806859
Project with Actor and LevelBP timeline attached.
Result: Actor BP timeline does not work.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-72559 in the post.