"Set Input Mode UI Only" possible Bug ?

I´m creating a widget from a mouse click event in the Level Blueprint. I use a basic WASD Movement. Once the Widget is created I use “Set Input Mode UI Only” to prevent further movement.
When I open the widget by pressing LMB while moving with A or D the Widget opens but my character keeps moving eiter to left or right until the widget is closed again. Is this a bug ? Is there another simple way to prevent my Character from moving after a widget is created ?

Btw. I also tried with a “Stop Movement Node” nefor and after the set input mode ui only… without success

how about the “disable movement input” function

Perfect. That does the trick. Thank You very much !