[solved] ScrollArea height is different when dragging on the scrollbar vs mousewheel or dragging the content

I uploaded a scrollArea sample

Scroll Area Bug?

If I drag the content height is ok

If I use the mousewheel height is ok

If I drag the scrollbar, a space at the bottom is added.

Is this a bug? or am I missing something, or doing something wrong.

I figured it out instead of align="center" on the scrollarea i changed it to align="topcenter" and it fixed it