Saddled pig sinks when ridden in water, whereas every other mount can swim

Bug:

When mounting a pig and guiding it over water, it sinks, dismounting the player. Whereas every other ridable mount--horses, donkeys, camels--swims when ridden across bodies of water.

Intended Behavior:
Saddled pigs are able to swim across water when guided using a carrot on a stick, consistent with other mounts.