Marking as a regression as this does not occur in 4.25.4
User description:
I want to have UMG UI that persists for the lifetime of the game so I create my root widget and add it to the viewport from a `UGameViewportClient` subclass. The widget's parent is a C++ class that overrides `UUserWidget::OnLevelRemovedFromWorld()` so that the widget isn't removed from the viewport when new levels load. Between UE 4.25.4 and 4.26.0 there was a regression that is breaking animations on pre-existing widgets when loading new levels. The animation appears to stop, but `UUserWidget::IsAnimationPlaying()` reports that it is still playing.
Result: The rotating logo UMG animation stops when the level is reloaded, but the widget continues to report that the animation is playing
Expected: The animation continue playing without interruption
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-106334 in the post.