Maskgroup Masksize bug

I have verified there is a bug with Maskgroup. To generate a MWE (minimum working example) download the example from here https://sdkdocs.roku.com/display/sdkdoc/MaskGroup

  1. Edit MainScene.xml and remove the animation block entirely.
  2. zip and view in FHD (1920 x 1080)
  3. Change Roku display type and view in HD (1280 x 720)
    notice the mask coverage is different. This is a bug and renders Maskgroup unusable if the intent is to support 1080 and 720 dynamically.

If you’ve set you ui_resolution to FHD in your manifest, you can calculate the actual maskSize by multiplying the image size with 2/3 (0.66666) (720/1080).

The same issue is with me, it is working on my two devices perfect but not on my clients device? Can anybody help me with the issue.