I was in a battle against another player and and his turn timed out. The time reached double zero but didn't switch over to my turn. I waited a minute or so but all that happened was the clock flashed a couple of times. I had to refresh my browser because my only other option was to quit and lose rank (although my rank was probably still negatively affected.
As Starwar7s put it, it is a very common complaint. All my recent major wink streaks (within the last few weeks) were lost because of this. I once had 13 losses in a session because of this bug. In short, this bug is ubiquitous in SM. Good luck devs!