Music App of my Huawei does not play my selected songs?

I've had a Huawei Honor 6x since Christmas and I'm really happy. But now my music app is not working properly anymore. If I click on a song now, it jumps to some other song. I can no longer choose which songs I can hear myself. Even if I delete the song, then my phone is looking for another song, which it always plays when I click on another song. I hope it was understandable and someone can help me to clear the problem.

I thank you in advance for advice.

Have a Huawei myself, I would try to delete the app and then reinstall it. Maybe that helps.