If the user sets the input mode to UI Only and then clicks on the screen in an empty area (so that it captures the mouse) the user will no longer be able to add any input of any kind and must use the windows key to regain mouse control.

Steps to Reproduce
  1. Open the Editor
  2. Create a new widget blueprint
  3. Open Widget blueprint
  4. Add an image to the widget blueprint
  5. Create the blueprint in the attached image
  6. Compile and save
  7. Play in Editor
  8. Click the image
  9. Notice you maintain control of input
  10. Click anywhere else on screen
  11. Notice that the mouse is captured and that you cannot exit the game
Community References

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Cannot Reproduce
ComponentUE - Editor - UI Systems
Affects Versions4.
CreatedMay 19, 2015
ResolvedAug 15, 2016
UpdatedJul 14, 2021