[Unreal 5.5] UMG SetAnimationCurrentTime Issue + Quick Fix

Development Programming & Scripting
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Hi everyone,

I’ve encountered an issue in Unreal 5.5 with the SetAnimationCurrentTime method for UMG animations. It seems this method no longer works as expected, preventing us from skipping to a specific frame in widget animations.

The problem appears to be related to the new UnwarpedPosition variable introduced in the UUMGSequencePlayer class. I’m not entirely sure of its purpose, but it seems to override the time set by SetCurrentTime during the tick.

What’s happening:

In UUMGSequencePlayer::SetCurrentTime, the TimeCursorPosition is correctly updated. However, in the next tick, it gets overridden by UnwarpedPosition:

UnwarpedPosition += DeltaFrameTime;

FFrameTime LastTimePosition = TimeCursorPosition;

const FMovieSceneSequenceHierarchy* Hierarchy = RootTemplateInstance.GetHierarchy();
FMovieSceneSequenceTransform RootTransform;
if (Hierarchy && Hierarchy->GetRootTransform().FindFirstWarpDomain() == UE::MovieScene::ETimeWarpChannelDomain::PlayRate)
{
	RootTransform = Hierarchy->GetRootTransform();
}

TimeCursorPosition = RootTransform.TransformTime(UnwarpedPosition);

My Quick Fix:

I resolved the issue by updating UnwarpedPosition directly in the SetCurrentTime method.

void SetCurrentTime(float InTime)
{
	TimeCursorPosition = UnwarpedPosition = AnimationResolution.AsFrameTime(InTime);
}

This fix solves my problem, but I’m curious if there are any side effects or a better approach.