Unstable Update Library/Add content with music

I have spend two days trying to get music I bought from google play music to load. I finally got there, but frankly it feels like a random crapshoot.

What I have found, is that id3v2 tagging with PRIV seems to cause mis-reads which are silently dropped during load, (DEBUG mode doesn’t seem to add very specific info about why it won’t include content). Oddly, not all music downloaded from google had the problem.

But also, that library updating is ‘unstable’ in as much as sometimes stuff loads, and sometimes not: its really unclear what a library rescan is doing, and when it re-reads meta data and when it doesn’t.

OSMC on a rpi, current spec (both h/w and s/w)

Is this musicbrainz? is this cosmic rays?