It seems positioned audio is to blame. I had the thought, then googled to see if anything came up, and found this C3 bug report.
That bug report refers only to Chrome and also only appeared to happen with unlimited framerate mode, which you shouldn't be publishing an app with, and also has different consequences to the problem you previously described. So my best guess is that is not related to your problem.
BTW
AsinineGames - unless you describe the particular problem you are having, it's also not clear if you are experiencing the same issue as described in this thread. This often happens with forum threads, where lots of people pile in with their own questions and issues, which are often unrelated, and it becomes so confusing it's impossible to make any progress on the problem. So to all involved, I would advise that you keep focused on the originally described problem, and be thorough in checking what is really relevant or not, otherwise you'll all be going on a wild goose chase and never get anywhere. Again, this is why we have bug report guidelines, to try to avoid wasting time like that.