Why I try to look at the picture on the reddit issue, I get only Access Denied. Maybe because I have no account on reddit. Could you upload it over here?
Others than that, status 12 isn't unknown at all, so I'm not sure why your query log shows this. It indicates that this query was retried:
This has not changed in how it works inside Pi-hole, however, it has changed that Pi-hole simply displays retried queries as such. Before, they were simply green "forwarded" queries and you could not tell them apart.
Why do you see such an apparently large retired count?
Check out this discussion for a possible reason (manual network tweaking):