Spurious Album Artist being picked up

I have noticed that on occasion emby assigns a spurious Album Artist to an Album. In the example below on the home screen, two Albums by "The Academy of Ancient Music" are being flagged as by an ensemble L'Arpegiatta. I have some albums by that ensemble elsewhere in the library. This appears to happen at random across the entire library but only occasionally. Rescanning or removing the album from the library, rescanning and then putting it back into the library does not resolve the issue. Ma

Thanks. Let me have a look at this. The tags are set by MediaMonkey so I will try a different tagger to see if that makes a difference. I will get back when I have done that. However, I am somewhat confused because an album which is correctly identified has exactly the same album artist tags as in the album causing problems (as the entire library is managed by MediaMonkey) as you can see below. The FFPROBE output for the first track Also MP3Tag reports the correct Tag. Maybe i