I think there is an issue with the resources pane when you have a lot of resources.
My current project has several hundred resources, and I have also recreated the problem by dropping a couple of hundred resources into a new project.
The issue is that if try and select a resource from further down the list, requiring you to scroll, the resource list jumps to nearer the top and you have to scroll back down.
It doesn’t always seem to happen but it’s often enough to be a nuisance.
If you cannot recreated it, I’ll do a screen cast.