UMG Dragging - Mouse offset?

Development Programming & Scripting Blueprint
1

Hey guys, I have the following setup to create a simple draggable window system… The problem is that the dragging laggs a bit and the mouse moves faster than the widget actually does. It looks like this:
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My dragging Mechanic inside the OnMouseMove:

Does anyone know how to fix this?
Thanks in advance!

2

Best guess is a math scaling error when you multiply “return value x/y” with “viewport scale”.