Sony bdp s370 not showing tags when transcoded

I'm using serviio with ubuntu and mostly everything works as expected however one thing that is bugging me is that when i transcode a flac or an mp4 to mp3 or lpcm the sony player does not show the files tags i.e album, artist, title. (its as if the tags are dropped when transcoded)
if i play an mp3 file it displays the tags as expected.
Can anyone confirm if this is a serviio limitation or bug or if its a limitation of the sony bdps370
a little more info
i get the same result with the default apt get ffmpeg package and with my current compiled ffmpeg as per the wiki guide.
if i play an mp3 file it displays the tags as expected.
Can anyone confirm if this is a serviio limitation or bug or if its a limitation of the sony bdps370
a little more info
i get the same result with the default apt get ffmpeg package and with my current compiled ffmpeg as per the wiki guide.