Hello Clickteam

I just finished my game and after testing i realized that sometimes or about 50% the buttons are not going on touch click to the next level ( next frame or frame number ). Instead it jumps to the end of the game ... hmmm. Not always but too often. The buttons have enough space for the fingers so there is no double action. Any ideas to this issue ? I have only Android 6 for testing available so i dont know if this happends also on < then 6.