After updating the iOs strange bug appeared.
When you choose the next song in the playlist or in search window and start playing it the new song is starting, but the old song lyrics still stay on the display. I need to touch the title bar where the list of songs appeared and the tittle of the played song is going to the bottom of the display. After touching the tittle again and the song details appearing on the display you can see the lyrics of the song you are playing. It happened around 30% of the cases.Sometimes the song lyrics are appearing, sometimes the old played song lyrics still stay.