Input Keys Modifiers strange behaivour

Hello everyone, I’m trying to map some keyboard events in BP and found that the Alt, Shift, Ctrl modifiers are acting triggering also the Input key.

I have two Blue Prints:

  1. Level BP
  2. First Person Character
    On the level BP I have keyboard 1-5 mapped and on the First Person Character I have Alt+1 - Alt-5 Keys mapped.
    The behaviour is that even if I press Alt+1, the 1 key also is triggered in the Level BP.
    Is there a way to separate this?
    Thank you!