Fullscreen resolution bug

Hello,
I have encountered a bug inside my unreal engine 5.4 project which I could reproduce in Fortnite too.
Reproduction steps:

  1. Launch the title and switch to Windowed mode in the settings
  2. Make sure the resolution is lower than the native screen/window size
  3. Move the title onto another screen
  4. Switch the window mode to Fullscreen
  5. Observe that the UI becomes unresponsive to mouse input

I could not reproduce this inside an unreal engine 4 project.
The issue seems to be related to a lower screen resolution. If the screen resolution matches the native screen size the issue does not appear. Switching to a lower resolution will cause the issue again.

My setup:
2x DELL S2721DS
NVIDIA GeForce RTX 3060 Ti

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