Date Added Metadata Issue

Please can anyone help.
Using v3.06.
I’ve lost the ability to make smart Playlists based on “Date Added”.
I clone my iTunes Master Library (iMac) and use that clone (on an external drive) to play on my Mac mini. I have been doing so for years without issue.
My friend runs an identical system and clone drive without issue.
My “Recently Added” smart playlists I try to make won’t discern the date added. Audirvana thinks all music was added today.
The metadata “Date Added” on the files is still correct but Audirvana perhaps isn’t reading it.
I added 500 albums recently but now have no way of finding them.
Is something corrupted?
I could copy any files from my friends system if that would help?
Any ideas?
Thank you