When testing on PC everything is fine. When testing on mobile device a strange behavior detected.
When starting the Frame for a first time - all events are working fine, but, if button "restart frame" was pressed, some events launching when they didn't programed to.
Like in the beggining, image appears and a random sound, 1 out of 4 is played. But after restarting, no image apperas and all 4 sounds plays at single moment.