Another issue that came after update to 2.10.5 - If I move the volume slider before pressing the Play button for the first time, the sound doesn't work at all, even after sliding the volume all the way up. If I refresh and press the Play button, then the sound and volume slider work fine. Reproduced with iPad Mini iOS 9, iPad 3 iOS 9, iPhone 6 iOS 11.
http://games.apelmongames.com/drag_test/
[Via #542, @Apelmon]