Player model stuck in flying position when gliding into powder snow

The Bug:

Player model stuck in flying position when gliding into powder snow.

Steps to Reproduce:

• Equip an elytra and fly into some powder snow.

• Attempt to stop flying by pressing space.
  → ❌  Notice how your body refuses to turn upright, and that you are stuck in the flying position.

Additional Information:

This report very closely relates to MC-162919.