Yes - on affected tracks the Title field, once populated, is now empty. I can see no pattern to which tracks are affected either - predominantly they are in my catch-all “Singles” albums though there are incidences throughout my collection, including one or more tracks in otherwise fine albums. And, to reiterate, all of these titles were once fine. (Also worth noting, I’ve had issues with titles previously and while there may be some correlation, there’s still no explanation for why things have recently changed for the worse.)
Yes, that could be. I will add my experiences there relating to my second bullet point. Hopefully someone else can come along as explain the first and the third.
Thanks