Hello @Michael_Putz ,
For the restore to be detected, the folder structure needs to be changed with the RoonBackups folder being the root folder, we believe the backup issue occurs due to the way it is currently structured.
We have done some further testing in the QA lab and we have been able to reproduce an issue when using a large number of tags (5-10k and over).
Using tags in such a high volume is a rare use case and further optimization would be needed and I am unable to comment on when/if such further optimization would occur.
Instead, would it be possible for you to try to add your tracks to playlists (or genre-based playlists) and see if that allows improvement? Thank you!