Can't found the song that has a name in Thai language since *.**.26

It’s perfect on *.**.22 but since *.**.26 It always have this problem, help me please 

Did you select a different ‘Region’ when you updated the firmware from what it was set to before?

I did  try to select ‘Region’ already but still have a problem. In my mp3 file I set only Album Tag and use ID3v2.3 it has no problem with firmware v*.*.22 it could show the song name in Thai Letter but when Update to v*.*.26 it conldn’t show that. I don’t know why or in new version of firmware it used differrent method to read mp3 file ?