I am having the same problem with Tags and Categories in version 6.8.1 (your last update). The Categories label often is simply not shown and the Tags label appears but none of the Tags are shown. Category entries will reappear if a new category is created and Tag entries will reappear if a new tag is created; however, the problem will occur again after exiting and restarting the application. It's very frustrating having to use this workaround to get the entries to appear. Please fix this!