I have reported a couple of Metadata issues before that has been fixed fairly quickly, I f I look at that mess I don’t think anything was added to any fix schedule. It is already more than 4 months old. And last comment was they are looking for exact way to replicate.
Lets not argue about nothing, MetaData works great for me except for the Airdate and any effort to get an issue raised and fixed should be appreciated. I have migrated over 3000 tv shows with extensive embedded Metadata that all works, I add and modify new data on daily basis, and except of airdate it works.
If the issue is already logged and on their fix list then I Profoundly apologize and would be happy but I would prefer an employee to confirm that it exists. I can’t see from that thread that an issue was logged. There is definitely a bug between old and new agent on release date.
Easiest way/Example: is to add a completely new epsode s00e99 that does not exist say under specials and assign a release date, it will never import. you can Plex dance as you like. Old Agent works 100% and new agent does not.