UMG Widgets preventing Touch Released events from firing

Development Programming & Scripting
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Steps to Reproduce

  1. Open TouchOrbit project, run PIE or Standalone or build shipping
  2. Touch and drag to make camera orbit, note the prints to screen. Touch 1 is being pressed and moved. Remove the finger and note a print for Released Index 1.
  3. Tap a few widgets on the screen, usually the combobox gives the most trouble.
  4. Try to touch and drag again outside of a widget. Note the touch index has increased despite only having one finger down,