Sonar doesn't load projects properly when the ui loses focus during the load process of a project.
For years I sometimes have to close and reopen projects in cases where I have shifted the computer's focus after starting to open a project.
This manifests most often in being suck on the cut tool in sonar.
I mention this because people having trouble with the ui seem the precise people most likely to be multitasking.
Could be true, true, unrelated. I don't know, but for folks troubleshooting it might be worth investigating.