hmm, you mean if you download the zip file at the top of this post (just to get the sound effects), then recompile the source at the top of post, you get the 2nd explosion noise cut off still? This was fixed for me for sure.
Or are you reporting a similar problem in your own code, because if so, perhaps you have found another bug OR your own code is bugged, maybe?
Or are you reporting a similar problem in your own code, because if so, perhaps you have found another bug OR your own code is bugged, maybe?