Lost in the loop

When I select some bars in a loop, with the button "play repeats" ON and the button "Pan score automatically" ON if I turn the button "Play" OFF, the sound does not stop (no the first time, but at the second time.
If I push the button "play repeats" OFF, it doesnot stop, but it stay on the same bar but playing some thing different (????). (I'm sorry, I use musescore to correct my lack in reading music so i was not able to say wihich bar is played)
I saw that with the bar 19 of my file but with the 22nd too (randomly selected by me).
I hope to have been clear enough with my English from France ;-)