Another issue to report: We have audio clips loaded via assetbundle into an audio array on our AudioManager script. These clips are then randomly accessed at different times throughout the game and played using PlayOneShot(). This has worked perfectly since v3.x up to 5.3.5f1. Now in 5.3.6p1, the same clip is always played regardless of which clip is accessed. Only happens in the WebGL build.
Looks like the issue happens as well in 5.3.5p6 (not in 5.3.5p5). So all those Audio fixes/improvements actually broke something in our audio.
Have you tried the 5.4 latest release? If it still has that issue, then submit a bug report using the editor. Make sure you attach a simple repro project.