OF3 Clean up when changing tag

I have two tabs, one for Today, and one for Errands (anything tagged “Errand). I have preferences set to Clean up “immediately”. If I remove the “Errand” tag on an item, it stays on the Errand list. Switching tabs has no effect. The only way to get it to go away is to manually clean up.

Bug or feature?

Annoying in either case.

OF3, MacOS 10.14, iMac Pro