Welcome to the forum. I don't remember ever hearing of that before. Is it happening on multiple models, or just one file?
I've only seen this (scrolling) happen many years ago... and it was not graphics related.
What I do see to this day is when features and sketches disappear when scrolling.. it usually happens when sketches or features are consumed while in a edit..
The only solution I have is to shutdown SolidWorks... after re-opening, I usually can see them but there is still a problem with sketch/feature consumption while editing.. it seems to be a random/inconsistent but more often it is after working on a larger file for a long time... it maybe a memory leak or graphics refresh issue in the feature manager?