A new optional tag group for AnKing Overhaul for Step 1 & 2 knows as Unified_Tags was released which covers around 34.5k cards, the upload was (probably) successful, however the clients of the optional tagging are receiving different number of these tags which is certainly less than what was uploaded. I had 8.6k missing, Aaron had 11k missing, Cameron had tags to 7.7k cards missing.
To reproduce the issue:
Go to AnKing Overhaul for Step 1 & 2, click on manage optional tags, select Unified_Tags, save changes. Go to anki and do a sync to ankihub, it will download changes but the cards tagged under this will be different. Actual missing should be only 206 cards (those have not been tagged).
Edit: Meanwhile during my attempt at troubleshooting I deleted the tags and now I’m not able to download the tags back. I tried selection/ deselection but it did not work.