Hello Shrooblord,
thanks for the reply.
I resolved it by reducing the fraction of screen that triggers the mouse edge scroll even more.
That did it for me, just be careful, standard mouse needs more space on the right than anywhere else.
Now, a timer, i think, is problematic if some people need time to click on “build”.
The particular problem here was, i think, that you could not trace where the mouse is in unreal,
especially with that input model now (see above).
But, unless you really need to make buttons at the very edge, it should be fine.
Just reduce the screenspace position’s section.
So, for me 2% edge have been good.
For completion, let me also show the rear:
i “add actor offset” to move the pawn (where my camera is attached to)
Cheers and stay productive & creative 
Comments welcome