Shift-Alt-click is a feature that will place the the cursor wherever you click, so could it be that you’re unintentionally doing this?
Whenever you move the cursor either with a shift-alt-click or by dragging it, I think we all expect to see it all the time and visualize the events around it. Specially if you are planning to press play afterwards! If it doesn’t scroll automatically it means that you have to shift-alt-click, scroll and shift-alt-click again which is annoying to say the least!