Disappearing Sound After Pause Attempt
For the heck of it I tried Pausing a Pantheon game against A.I. players. The sound of the immediate combat faded out as it should while I was in the menu, where my pressing of the Pause key was to no avail (I hadn`t enabled Pause, or Pausing is impossible to do during Online Pantheon play). Satisfied, I escaped from the menu, both by hitting ESC and by Cancelling the menu, but my primary sound sources never returned - the effects remained faded.
This lasted until the end of that particular contest.