OnFinishedPlaying not work in a class create by APaperCharacter.

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I create a Character from APaperCharacter.And want trigger callback when the Sprite finishs animation.

Check the source code in PaperCharacter.h found class UPaperFlipbookComponent* Sprite.

And in PaperFlipbookComponent.h found virtual void TickComponent(float DeltaTime, enum ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) override;

So I run GetSprite()->TickComponent(DeltaTime, ELevelTick::LEVELTICK_All, NULL); in Tick(). I add breakpoints in TickComponent but never trigger.

And I run GetSprite()->OnFinishedPlaying.AddDynamic(this, &ASoldierCharacter::FinishedPlaying); in BeginPlay(). Not work either.

Any ideas, or i use it wrong. Please help.