Given

1. A scrollable with scrollPosition of ScrollPos_Bottom
2. During the event frame of the display region changing

When

A scroll position is that is requested for the scrollable via scrollTo (and probably also scrollBy) that is

1. within view given the "current" scrollPosition (ScrollPos_Bottom) and scrollHeight
2. outside of the view given the updated height

Result

The scrollable maintains the scrollPosition of ScrollPos_Bottom, effectively ignoring the requested scrollPosition.

Expected

My expectation is that the scrollable would update to the requested scrollPosition, given that position would be outside of the view from the ScollPos_Bottom position, using the "totalLines" and "scrollHight" of the new event frame.

Context

I am building a way to select a line from a list, by having the list displayed in a scrollable and having it scroll when the user moves the selection past the ends of the scrollable.

But, to maintain that the currently selected item stays displayed, I need to scroll the scrollable to a appropriate position when the height of the scrollable changes, as the selected item can get cut from view when the scrollable shrinks. So, therefor I am pushed to move the scrollable in the same event frame as the height changing.