Material Parameter Collection Track doesn't work in UMG Preview from 5.7

The UMG editor allows us to add a Material Parameter Control track to an animation. This track makes it possible to animate parameters used in a material. Designers can scrub the timeline and preview the changes in the editor.

However, from UE 5.7, the value of the Material Parameter Control track is not reflected in the preview.

1. Install UE5.6 and UE5.7
2. Download and open the repro project for UE 5.6 (MPCIssue56).
3. Open "UMG_Test".
4. Open the Animation panel and select "Test Animation" in the left panel.
5. Scrub the time cursor and confirm that the scroll speed changes in the preview.
6. Download and open the repro project for UE 5.7 (MPCIssue57).
7. Repeat Steps 3 to 5 and confirm that the preview does not respond to the parameter changes.