Is there a way to speed up horizontal scrolling w video?

My session is super slow scrolling to different places when I have a video open. I don’t have this problem with other daws. Is there a way to improve this? thumbnail cache is set at 128mb, same issue at default setting. I do actually need the thumbnails, as well. On a mac pro with dual d300, not that it should matter, never had scrolling issues in Logic on my 2008 mac pro. Cubase 9.510