Indeed, i just checked it after your reply and on my iphone "one" finger is enough to scroll. (perfect!)
When trying 1 or two fingers on the android it does not scroll the text in the box, but the whole layout.
And it does only scroll the whole layout when i am touching the multiline box.
So touching anywhere else on the screen has no effect at all.
In other words: When touching the multilinebox, it looks like it reacts to a scrolling action, but instead of moving the text inside the multilinebox, it just moves the "multilinebox itself" and the complete layout.