Add a tag to an item (I used CMD-SHIFT-T). It properly shows up when doing a search for “#”.
Remove the tag from the item (I bring up CMD-SHIFT-T again, then use the delete key to remove any existing tag).
The item will not show when filtered on the Tag value it previously had.
It will show when searching for “#” even though there is no visible tag associated with it.
Searching for “#” does properly drop any items from display that do not have a tag with it, provided that item never had a tag associated with it.
Looks like the HTML for a removed tag is keeping 'data-tags = “”'
where as the data-tags attribute doesn’t exist for an item that never had it.