virtualScroll scrollTo generates TypeError: Cannot read property 'scrollTop' of null

Thanks for your suggestion @sujithsavithrybalan.
Tried it but same error on different object.
error
TypeError: Cannot read property 'scrollTop' of null
changed to
TypeError: Cannot read property 'scrollIntoView' of null

And the more I investigate it, I realize that it has nothing to do with how far ahead I scroll but HOW FAST I scroll.
If I bring the slider down one step at a time, it is fine.
If I bring the slider down fast then I get the error.