Players still swim if there are blocks at or above them while swimming

Exiting water while swimming will enable the swimming mode to continue if the vertical 2 block area (that the player will later stand in) is not water, lava, a plant, or air. If the area where the player is at should cause them to fall (as intended), looking down will do the job, but looking up again will cancel the effect. Continuously going down until the player could stand (water, lava, a plant, or air is filling an area 2 blocks vertically) will allow them to exit the swimming mode.

If the player leaves the game while in this state, joining again will teleport them to a valid Y position upwards (not downwards). Doing this will also put the player in a special sprinting state where particles do not appear, and jumping is slower instead of faster.

Link to report:

Bug,Swim,Teleport,Sprint,