Thanks for helping me figure this out.
After further testing, it turns out to be a bigger problem 
Scrolling is not actually the issue. The actual issue is that any time I pause while dragging something, the app behaves abnormally.
When dragging almost ANYTHING in the app! The only thing unaffected seems to be rearranging tracks inside a playlist.
For drag-handles when rearranging items, the app drops the item at the position where I paused and instead begins scrolling from there.
Below you can see the difference between Beta 5 (blue) vs Soft 15 (red):
Notes: The trailing line would reset if I had let go at any time. (I don’t.) This is happening everywhere inside Settings. (For examples: rearranging Library shortcuts or Media Providers)
Media drag and drop also causes a quick scroll-to-position that shouldn’t happen:
The same happens when re-ordering the Now Playing queue:
Tested on a fresh install–same behavior. Seems this may not affect everyone, since you said in your steps that you are able actually pause while the app scrolls.