Bug on file name Clip Zip

I copied some of my song with iTunes m4a aac file and It named in Japanese and Vietnamese. When I put it to my clip and turn it on. I find that some of them appeared in podcast instead of music category. When I select a song with japanese name and press play, it shutting down and I have to press the power button for 30 secs to restart!

I tried these file with rockbox on clip zip and it works fine! I don’t know why, please check and fix it. Thank you

Sorry for my bad english

The Zip is discontinued, so there will be no more firmware updates. If it works fine using Rockbox, then use that. 

Sandisk players are much better as far as hardware than their firmware is.