After a few activations and deactivations, selecting objects or selecting the details or activating the detail windows become hit and miss in the attached project.
Inactive Detail WindowsFurtherPurged.3dm (13.8 MB)
At first I thought this might be related to the VisualArq display mode I was at first using in the detail windows, but Ramon of Va helped me verify that the anomaly remains even with Va deactivated. He made the gifs below demonstrating the problem. Of course selecting an object in the model can be done in a view port, but this becomes a very severe issue when a detail must be edited (changing the display mode just before printing for a presentation meeting, for example,) and it’s impossible to activate the detail to do that.