if you open a pdf in Orion, the PDF viewer UI can be scrolled up and down. I am consistently able to reproduce a small scroll although randomly there is a large scroll amount too.
Should happen on any pdf although i used this for the recording - https://cadxfem.org/inf/Fast%20MinimumStorage%20RayTriangle%20Intersection.pdf
Version 0.99.128.2.1.2-rc (WebKit 621.1.2.111.4)
Sequoia (15)
