Affects Version/s: Minecraft 1.13-pre5
Fix Version/s: None
Windows 10 64-Bit JRE 8u125
After letting go of sprint key and movement keys, player is stuck in swim mode underwater.
How to Reproduce
Go underwater, and go into Swim mode, then let go of the controls. You'll see you're stuck in swim mode.
In my opinion this could also be a useful bug in some cases, you can just literally float there and look around, and it looks cool.