It happens quite often that when opening an ArcGIS Pro project, the link to an ArcGIS Server layer is broken because there is a problem with the server. Currently, it takes a very long time (> 10 minutes) until the project opens and the layer displays with a broken link. I found another post addressing this issue:
https://community.esri.com/t5/arcgis-pro-questions/local-server-taken-offline-issue-with-pro-projects/td-p/1332452
Is there a way for setting a maximum waiting time for a layer with broken links? This would be great.