I used to have this problem with flac, but strangely it's now started happening with mp3s.
Basically MM reads the tags fine when I navigate to the folder in the explorer sidepanel, but as soon as the song starts, they all (or some of them) disappear?
I'm not sure if this is clear, so I've included screens. Before I hit play:

After I hit play:

I left the images in, but I can link to them if that's preferable.
It doesn't happen with all folders, in fact it's still quite occasional, but these are folders/files for which the tags have been read fine by foobar. I haven't noticed anything distinct about the files that don't work as compared to the majority that do.
Any help?