Album and Track sort order

I usually use TIDAL and not my local library, so I don’t know if this has always been a problem…

When I click on ‘Albums’, they show in expected alphabetical order.
But when I click on an Artist, the albums listed are in seemingly random order. Neither alphabetical or chronological.
And when I click on an Album, the tracks are also in a nonsense order.

My library is on a NAS, could that be a factor? Is there a setting somewhere I’ve missed?
thanks for any help

ETA: Volumio 3.569 on a raspberry pi3, NAS is a Synology