Hello, I upgraded ArcGIS Pro to version 2.8 because there were a couple of things I thought weren't working correctly or were not working in the older version. I seem to have the same issues with 2.8. When I try to reorder anything in the Contents pane in List by Drawing Order view it crashes. It also crashes when I try to drag a layer into the map from the Catalog and I always need to use the Add Data button. Do these things just work differently than they did in ArcMap, or is this a bug either in ArcGIS Pro or in my installation of it?
First, make sure it happens with all projects, including a new one.
If it does....
Windows Add/Remove Programs, select Remove, then Repair
It might fix any issues with the install.
Barring that, a complete removal, and reinstall may be in order
Usually, this type of issues are very rigid, and a repair might not be enough.
Adding the steps for a clean uninstall of ArcGIS Pro as suggested by Dan. In case you have a Single-Use license of ArcGIS Pro, please ensure to deauthorize the license before uninstalling ArcGIS Pro.
Also ensure the latest graphics card drivers are updated.