UMG ProgressBar Incorrect Mask behavior

Development Programming & Scripting UI
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Steps to Reproduce

  1. Create a new UMG Widget (BP inheriting from UserWidget)
  2. Add a progress bar widget somewhere in the hierarchy
  3. Set the widget to use Mask fill mode
  4. Set Percent to 0.5
  5. Observe that depending on the zoom level, the fill size changes.