Button input is ignored when toggling Input mode from UI to Game

IE_Released is called when switching between the Game and UI input modes, despite the button being still held.

Tested in 4.19.2 (CL - 4033788), 4.20.3 (CL - 4369336), 4.21 (CL - 4527422), 4.22 (CL - 4524214)

1. Download the attached project
2. PIE
3. Press and hold the Shoot button (F) to have the particle effect
4. Also press the Pause button (Spacebar) to the Pause menu appear
5. Navigate to the Resume button and click it, while to still holding the Shoot button

Expected: The input for the Shoot button would be still in the Pressed state.

Result: The Shoot button input has the Released state called upon it.

UE-66056 is marked as By Design