You can get a repro pretty easily with only BP by debug printing something on an enhanced input action press / release event, and also on debug press / release (e.g. in level script), holding down the key, then unfocusing the window by pressing the Windows key or something, which will call FlushPressedKeys - you'll see the debug release event fires, but the enhanced input event doesn't fire.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-165730 in the post.
| 0 |
| Component | UE - Gameplay - Input |
|---|---|
| Affects Versions | 5.0, 5.1 |
| Target Fix | 5.3 |
| Created | Sep 30, 2022 |
|---|---|
| Updated | Jan 20, 2023 |