j0nnymoe is right, you shouldn’t rely on the headless instance to do a full scan.
All my library updates are done on my media player device, in my instance it’s the Nvidia Shield.
If I do a full scan I do it from there.
Cleanup as well.
When the db was migrated it was also the Shield that performed this function.
The headless instance does updates based on my sonarr and radarr pulls only, as the shield is not on all the time like my headless docker.
I would recommend installing Leia on your PC and setting up sources and advancedsettings xml files there.
Remove your new DBs from Maria, and allow the software to migrate the database.
Then running a full scan from there as well.
Just want to let you know that you should always backup yout MariaDb, I have had several database corruptions over the last few years.
You can find the script to do that here…