Music mp3 play

Sometimes(random moments and randomn songs) when I use wd2 go app pro to play a mp3 file…it wont play and at the bottom of the screen the song title is   music_name

Does this happen to anybody else and does anybody know why it happens?

I should also mention…the same file will sometimes play hours or days later…but sometimes it wont…and shows music_name as the song title and doesn’t play

Does this happens on different files?

Will try to reproduce later on with my iPod