If you’re clicking those, what is the InputInteract for then? One thing that could prevent an interaction like this but still display the Hovered behaviour is Input Consumption.
If you’re Left Mouse Clicking those buttons, do you use the Left Mouse Button for anything else, in another blueprint, perhaps in the Level Blueprint? The LB can easily steal priority and consume input.
You could test it by switching to Input Mode UI Only; this will prevent the player controller from consuming input but will still allow you to use widgets.