@Spork: 3 minutes ago I wrote this post the problem occurred again!!
Did some editing in chords and lyrics window of track 1, track 2, track 3 and track 4. Then I switched to track five and all the lyrics is on the false position.
Following two pictures show the false positioned lyrics:
The lyrics in the tracks view and the lyrics list editor was also on the false position (sorry no screenshot).
The right position should be here:
Used version: 2.1.13.215