Hi mboeringa,
I appreciate you bringing this to my attention. I didn’t notice that this node was part of a larger boundary relation. I noticed that the tag was removed in changeset 143605371 back in November-  https://osmcha.org/changesets/143605371. That is what prompted me to look into it, and I found that source I linked my changeset comment. I’ll add back the level 2 admin.
Thank you again, please feel free to reach out if you have any further questions, comments, or concerns. Have a good day!
-Nick