Consistently hanging when viewing PDFs

Hi team Opus, trying out the product as replacement for archaic Explorer in Windows 11. Looks to have everything I need and more (Favourites on top being the first).
However it is regularly hanging when scrolling through PDFs and have the viewer pane open. There are certain PDFs that seems to dislike previwing more than others.

Thoughts?

Opus doesn't include a PDF viewer of its own, it uses whichever is registered as the default preview handler in Windows.

Basically if you have trouble with your current PDF viewer, whichever one it is, the best advice is to try installing another one (e.g. Adobe Acrobat Reader, Foxit PDF Reader, etc.)