Hi there,
It’s very odd that you get the desired behaviour once you have a nested widget. It might be worth sharing some of your code around how the widgets are added to get to the bottom of that.
In the meantime though, when you bring up your widget interface you could call Set Input Mode UI Only to see if this gives you the desired behaviour. You would want to make sure that once you want the player to be able to make game input again that you call either Set Input Mode Game Only or Set Input Mode Game And UI.
Thanks,
Hayden