hi,
4.20.1 is in live, and it should fix the bugs.
*4.20.1
- BugFix: Expose bUseCustomCurve for BP to fix bUseCustomCurve are set to true by engine.
- BugFix: CurrentDuration and CurrentAlpha value in UHorizonTweenEvent::Finish(bool bTweenToEnd = true)
- BugFix: CurrentAlpha in UHorizonTweenEvent::Finish for EHorizonTweenPlayMode::PingPong