With education edition enabled and mayfly and worldbuilder abilities set to true. If the player is in survival mode and logs out of a world, then upon logging back in the abilities are no longer enabled. This occurs in both local and server play. This might be the case with all abilities I'm not sure and be intended, however it's inconvenient. Also on a server with mayfly and worldbuilder abilities enabled and the player in survival mode and mid flight, if the worldbuilder ability alone is disabled the player begins to freefall. In this instance I think flight should be maintained.