Sprinting underwater while flying in creative makes player start swimming

The bug

If a player presses "sprint" key when moving in creative mode underwater, it instantly switches to "swimming mode." The player can still toggle flying by double-tapping space, but the swimming controls will override that state. Thus, it is possible to be both swimming and flying at the same time.

Expected behavior would be:

• Creative players never swim while in "flying state"
• Creative players can swim like survival while not flying

How to reproduce

1. Move in water when being in creative mode
2. Press "ctrl" or "sprint" key
3. "Swimming mode" is toggled on
4. If the player swims / sinks towards the bottom sometimes gets stuck and cannot move up / stop flying / swim up

The issue can be fixed by looking up (this toggles the "swimming mode" off) or switching into other gamemode.

Note: Spectator mode is not affected (anymore).