Summary:
Flying in creative and pressing jump and crouch at the same time results in the player jumping up in intervals.

Steps to reproduce:

• Creative
• Go into fly mode
• Press jump and crouch at the same time (defaults: space and shift)

Expected result:
The player to stay at the same altitude in a crouching position.

Observed result:
The player "jumps" mid air and increases altitude in intervals.

Video attached:
Crouch and jump (while flying).mp4

Additional information:
A similar bug has recently been fixed MCPE-25902