Players go into sneak model when swimming in small caves, which makes swimming feel awkward and slow

Because the model automatically updates to the sneaking model when in areas less than 2 blocks tall, the player model will almost randomly over-ride the swimming animation with the sneaking one because the height above the player is greater than 1.5 blocks and less than 2 blocks.

[#https://youtu.be/dsvwUXdamew|https://youtu.be/dsvwUXdamew]