If you are in survival or adventure mode and switch to spectator, mobs still track you and act as if you are in one of those two modes. This does not happen if you switch from creative to spectator.
MC-47971
Mobs can still track players in spectator mode
Resolved
Duplicate
0
Duplicate of MC-46596 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.