[MC-309688] The cushion allows you to pass through fences and walls.

If you place a cushion on top of a fence or wall and get off, you can pass through them.

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You found the same bug I did, I think you made a duplicate of MC-309677

Except you showed that you can go through the top

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We're tracking this issue in MC-309677, so this ticket is being resolved and linked as a Duplicate.

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