Some users reported that the "more" option when assigning tags is missing.
Release or Environment
There is a macro which is responsible for rendering the tag in "Action on selected rows" list, Its doing a query to find unique tags from label_entry table which stores the tag, It uses the user's current tag which are recently assigned by the user.
If the user had 9 or more . recently used tags then it will show the "more.." option in the "Action on selected rows" action.