why is interaction: receive hardware input disabled when placing a widget in an actor blueprint

i allow the player to place a new building in the world
the building is really the actor referred to here

the player uses the mouse to locate where the building must be placed

i use the player controller mouse cursor coordinates to move the mouse around in the world

this works “perfectly” fine (it works as is and like that)

i need to add a widget so that the player can interact with the building(s)

when the player clicks the building the widget must appear and the player can interact with the widget
it has a slider and drop down list (combobox)

even this works perfectly fine as long as i have this particular widget independently / separately outside the actor blueprint

if i start to put the widget inside the actor blueprint (at some point it made sense but i am starting to wonder) and allow hardware input in order to avoid widget interaction i loose the ability to move the building around as i use to
i am still trying to figure out why
it might be that the mouse goes to the widget now foremost
it might also be that i am enabling the widget too soon for practical purposes