First thanks a lot for this very handy player.
But now I have a problem which concerns the MX Player not directly. I use a Galaxy S4 with Android 4.4.2. Sometimes I use the multi window feature (split screen) to view two videos at once. Now since version 1.7.39 I cannot play two videos at once anymore. If I press 'Play' by the MX Player the other player pauses and vice versa. I hope there is a solution.