I searched for similar bug and attempted to post in that thread but was shut down due to age of post so this issue has survived (or resurfaced) for over a year.
The Water Trap or Quicksand in Cyrodiil still persists. And to make matters worse, you cannot use 'Get me unstuck' without waiting for a one-hour timer to count down before use. Only solution is to wait it out, or shut down game and wait for 10 minute time-out and be forcibly removed from Cyrodiil. This occurred on July 21 thru 24, 2017 on PS4 NA Server - Campaign Shor.
Bloodmayne Close-up showing red circle at water trap | quicksand location
Photo of several people trapped in water trap | quicksand location
Krishak Kringle aka KrishakPanettier, Templar (PSN:KrishakPanettier)
-- PS4 NA --
PVP, PVE, and Trader Guild Leader