Yeah I was unable to reproduce the issue and record it at the same time. It would always deadlock for a few seconds. I guess my 4.3 GHz 2500K quadcore is not good enough anymore. :rolleyes:
The actual issue happens without the deadlok too. I lowered the number of triggered sounds to 40 and it still happened with approx. the same freqency as with 100 triggered sounds. I say again, feel free to download this test project. All you have to do is open the editor, load it, play it, press LMB a few times with stat audio enabled and listen for yourself. It really seems to be an edge case. 