UMG: The widget animation does not apply track changes in the packaged game as in the editor.

Hello community. I created a widget and added buttons and simple animations to it. I am applying new parameters to the track section before the animation is played. In my case, I switch the "Set is Active’‘. Everything works correctly in the editor. But in an already packaged project, the animation from the widget does not react to "Set is Active’’ or ‘‘Set is Locked’’ or “Remove Section”. Everything works correctly in the editor, but no changes are applied in the packaged version. The animation is just playing and that’s it. Deleting a track does not get any effect too. It’s new project. All in default. What I missed?