This is a repost of MC-207387 for Bedrock Minecraft.
Pressing the sneak button while in water does not prevent sculk sensors from activating while moving.
Steps to Reproduce
Stand in an area of water
Place a sculk sensor anywhere nearby
Press your sneak button
Move around a little
Here, the sculk sensor activates, even though the player is sneaking.
affects 1.17.30.20