SUMMARY STEPS TO REPRODUCE 1. Open Akonadi Console 2. Open Tab Browser 3. Observe that an icaldir resource is shown to contain e.g. 804 items (with 804 unread) in the collections overview 4. Select that icaldir resource 5. Select all items of the selected resource in the list to the right 6. Open the context menu → There are really only 238 entries selected (and all visible entries are selected) 8. Open the directory of the icaldir resource in Dolphin → There are 237 files in that directory OBSERVED RESULT EXPECTED RESULT All numbers should match, but at least the number inside of akonadi console. I assume, that the number in the overview is wrong. SOFTWARE/OS VERSIONS Operating System: Debian GNU/Linux KDE Plasma Version: 5.17.5 KDE Frameworks Version: 5.70.0 Qt Version: 5.14.2 Kernel Version: 5.8.0-2-amd64 OS Type: 64-bit Processors: 4 × Intel® Core™ i5-6500 CPU @ 3.20GHz Memory: 11,6 GiB ADDITIONAL INFORMATION With an icalfile resource, the bug does not seem to appear.