I compiled and tested the demo Platformer with Leveleditor and experienced a bug with the jumping sound. After playing a little around the jumping sound disappeared and also didn’t reappear after I quit and rejoined the level. (All other sounds keep working). I experienced this issue on two devices on Android 5.1 and 4.2.
Here is a log:
Line 1197 looks suspicious but I don’t know how to debug this issue. I only added a line in AudioManager to see if the jumping sound is triggered which is true.