Double tapping space/space bar whilst in spectator mode turns off flying when switching back to creative

Steps to reproduce:

• Open a world

• Go into /gamemode creative

• Fly into the air

• Now, run /gamemode spectator

• Double tap space/space bar, depending on your platform

• And finally, go back into /gamemode creative

Notice how you fell to the ground?

When switching back to creative, the game is supposed to remember that you're still flying.

Potentially what's happening: the game thinks you're somehow turning on/off flight by double tapping space/space bar in spectator, even though it's impossible to turn off flight in spectator, and you're still flying.