This error has been present since version 1.20 and persists until beta version 1.20.20.20
Bug: When the player is in flight mode, the sneak mode will not work for him.
I interacted with Luke to show that the sneak mode does not work. After all, when a player is in sneak mode, he can put a block next to the hatch.
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We're tracking this issue in MCPE-167043, so this ticket is being resolved and linked as a duplicate.
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