Inconstantly the tags on the configure asset page are not filling into a selectable tag for the asset until you delete a portion of the tag and it re-recognizes it.
(See video below)
After experimenting it appears that it is more common to happen when deleting letter(s) from the tag and re-adding them. (Especially if it is the first letter) However this is not the case all of the time, please see attached video.
Page URL: https://create.roblox.com/dashboard/creations/catalog/[ID]/configure