[Android][Playlists] Problem with offline mode in huawei p9 device

[nrahkala]

When i have downloaded some of my own playlist usable in offline mode, for some reason 30% of songs cant be playd. It just gets stuck in the song at 00:00 and when you go few songs forward some songs start playing. When i go online and listen to song that doesnt work and go back offline then it works. But theres quite muck work do go through all songs. Could it be update problem? All songs have been loaded, its not the problem..