I'm not sure what it's called, but in recent versions of Xubuntu (I'm on 18.04, 64-bit), I've found that when I'm viewing a long page to scroll on if I don't scroll quickly to start with, or if I hold the mouse button on it and don't scroll for a while (which I do a lot), then it enters a different scrolling mode where it can't scroll quickly (and where the mouse pointer doesn't stay in line with the scroller). I do not desire this behavior. Is there any way to disable it?
One workaround is to scroll quickly before scrolling (and then the more gradual scrolling doesn't initiate).
Also, if you can let me know what this scrolling feature is called, that would be great. It seems to be disabled, now, for some unknown reason, but earlier today (just before I started on this post), and for months before that (and probably longer), it was working.