Button Focus in Split screen not working as expected

I have a weird problem with the focus on UMG widgets in a local multiplayer (split screen) environment.
In Game mode, after Begin Play, I added a second player with Create Local Player. The player gets created as expected and the viewport gets split horizontally.
In the player controller I added a widget with multiple buttons. The first button gets focused automatically on each side.
When i press D-Pad down with gamepad 1 the behaviour is as follows:

  • on the left side not the next button but the one after that gets focused
  • on the right side the next button gets focused
    When i press D-Pad down with gamepad 2 the behaviour is as follows:
  • on the right side the next button gets focused (as expected)
    I can’t figure this out. Things I tried so far:
  • I tried setting focus, user focus, keyboard focus in the construct script of the widget.
  • Setting the owner of the widget after initialisation
  • Using Create Local Player For Platform User
  • Delays between creating a player and initializing Widgets
  • Replication of the method that initializes the widgets

When i control my characters everything works as expected. Only the focus in the Ui gets messed up.