My tags that used to auto-fill when I started to type aren't displaying anymore. What happened to these tags?
If a tag is not used in a ticket for 60 days it will get dropped from your Zendesk Support account's indexing. You'll see this behavior in tickets, Help Center section restrictions, user profiles, and organization profiles.
To fix the reindex of the tag
1. Go to a ticket (or user profile, or organization profile) that is supposed to have a particular tag.
2. Re-add the tag by typing it into the tag field and hitting the return key to reindex the tag!