Focus rule on 3d widgets

Hey,

I have the focus rule option in project settings (Engine, User Interface, Focus, Render Focus Rule) set to never but my 3d widgets still get given a focus rule when the buttons are focussed. Have I missed something or is this an engine issue?

Video showing issue: Focus Rule Issue - YouTube

The focus rule with the dotted line is gone when I enable in the widget component “Receive Hardware Input”.