Issue relates to behavior of the Event BeginPlay and the propagation of variables. (The sequencer value is being sent after BeginPlay is called?)
1. Open attached project
2. Observe FloatVar in LevelSequence is set to 20 (default floatvar is 10)
3. Play in Editor - Observe BP spawn with value of 10
4. Add delay to event begin play - Compile
5. Play in Editor - Observe BP spawn with value of 20, also: BP may spawn immediately on begin play (and another will spawn during the sequence)
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-53327 in the post.