Hello Rudy,
thanks for helping.
Steps to reproduce:
1.) Create a new FirstPerson C++ project.
2.) Besides WASD, set the cursor keys as motion input for your character in the project settings
3.) Subclass C++ class ‘MyUserWidget’ from UUserWidget
4.) Subclass blueprint ‘BP_MyUserWidget’ from ‘MyUserWidget’
5.) add 2 Buttons to ‘BP_MyUserWidget’ in the designer tab
6.) compile and start play
7.) click on one of the buttons
8.) notice that you cannot walk anymore using the cursor keys, but WASD still works. This is the bug. It should still be possible to use the cursor keys to move the character.