[UMG] Scrollbox blocking RMB

I have scroll box, with many buttons. Every button is widget, and inside this widget i calling this BP Event every frame to check on RMB click

But scrollbox is blocking IsInputKeyDown, and its always return false if cursor is inide the scrollbar.
How can i disable it? May be in source engine code? If somone say where is this in code, i can try disable it.

P.S. Sorry for my bad English

No solution?

Solved it by creating my own scroll widget