I tried renaming tags today and ran into an issue. Just does not work. Example: nested tag "category/cooking". Tried to rename to "category/food" using the right click over tag name and typing in new tag name, then pressing enter to complete. It looks like the tag has been changed until TAGS is minimized or 1PW is closed. Expand TAGS again, or reopen 1PW, "food" still appears as "cooking".
1Password Version: 1PW7.2.4
Extension Version: Not Provided
OS Version: MacOS High Sierra
Sync Type: Dropbox