The audio thing is not a bug, its just that the audio you add needs to be 30 seconds or less, if its longer than 30 only the first 30 seconds Will be played
When switching to a different card the audio still plays but the script is now gone so what happen is the script of: repeat every 19 seconds is not in active which makes the audio stop at 19 seconds
I've done something so the audio don't go (check my deck)go to the last card where you run super fast.then get the thing making music at remove the first file(place the thing).also change the time from 19.7 or whatever to 0.1 and that's it I think.