unexpected behaviour after update 260

[Peter StreamMagic]

I have tried to reproduce this behaviour on my PC and therefore created subfolders for AlbumArtist, Artist and Composer and copied a few pictures to each subfolder.

properties:    

result:     the correct Artist icon is submitted when Artist picture is missing.
so far so good,but......

Except from Audio Data, all index Tags show up like expected.

result Audio Data:    

I noticed that on my NAS the the index Tags were placed in a different order, so I changed the order on my PC.

properties:    

resulting in:    

So I changed the properties on my NAS (different order).

properties NAS:    

Result: when Artist picture is missing, the correct icon is submitted.

side effect : the custom made icons in Recently Added and Recently Played no longer appear

Edit:ignore the last sentence, probably wishful thinking!
Since there are no custom made icons for last month, last week etc. in my library it is logic the Linn icon pops up.