(this is Pro v2.4.1)
Yesterday afternoon, I just opened an ArcGIS Pro project and saw this...
...for 15 minutes.
I could change Portals, look through the Catalog, change Portals - but the Map never loaded. I had to open Task Manager and kill the app. ArcGISCleanup was running too.
I created a new project and encountered the same thing.
It doesn't crash, it just never loads a map.
Has anyone else seen this behavior - or have a solution?