Created a catalog of a years worth of images, couple thousand pictures.... no problem. Searchable on metadata.... no problem. Quick search on a string in the filenames.... no problem, PM6+ opens a contact sheet of the found images. Try to create a top level collection of the found images.... the images in the contact sheet disappear, nothing added to the collection. Try to create a collection nested under the top level collection. Same problem. In both cases the contact sheet that was produced by the quick search remains empty. If I click in the quick search box and repeat the search the resulting contact sheet is again populated by the images I searched for. If I repeat this process several times all of a sudden the collection is created with the images from the search. Kinda weird huh?
PS. the images I'm trying to add to the collection are already in the catalog. Also tried dragging the selected images from the search results contact sheet to the collection. Same problem.
PSS. A new discovery: clicking in a blank area below the name of the collection adds the selected images to the collection. Yay! Clicking on the actual name of the collection erases the images in the search window, nothing added to the collection.