There Was a Network Problem Getting Apple Music - No Subscription

I have my own carefully curated library of over 2,000 albums that I use in my car with Carplay and Siri. It's perfect. Or rather it was.

Foolishly I signed up for a free 6-month trial of Apple Music (I just thought I could play a few albums I haven't heard for years) and found that I could no longer call up an album from my own library as it would always use the Apple Music version. And even worse, it was no longer possible to play one of my own compilation albums that it didn't have - it just played a random selection of rubbish instead. On top of that whenever I was driving in an area with no 4G connection, such as the English countyside, or even parts of the M25 in Hertfordshire, music would stop playing.

At least I had the option to swap all of my own music for Apple's switched off, so it didn't upload my whole collection (or Apple's version of it) into the cloud.

Anyway, the free trial has now ended and since I had cancelled the subsciption auto-renew I'm now back to using my own library, which sort of works, but for one annoying thing: whenever I ask Siri to play an album (e.g. Play album Abbey Road by the Beatles) Siri replies "playing Abbey Road by the Beatles" followed by "there was a network problem getting Apple Music" and then plays it from my library anyway.

At least it works now, but is there any way of stopping that annoying message everytime I ask Siri to play something?