Same Album Title - Different Album Artist

[Birdy]

I did some further tests.
My issue is not related to typos, mismatches or "special" characters.

It looks like that tag update facility is not working as expected.
It is "only" working for the last 3 lines.

If I just change the order (copy and paste), it also changes the result.
I can re-produce it.

Second test:

@ALBUM=Greatest Hits
&ARTIST=Lenny Kravitz
=ALBUM=Greatest Hits - Lenny Kravitz

@ALBUM=Greatest Hits
&ARTIST=Robbie Williams
=ALBUM=Greatest Hits - Robbie Williams


Bose Soundtouch App / BubbleUPnP:
Greatest Hits
Greatest Hits - Robbie Williams