[MC-143894] Falling blocks can land on blocks they're not supposed to

Credit to _MethodZz_ for finding this bug.

The bug

When a falling block slides over a fence or cobblestone wall, it can land on blocks it is not supposed to.

Steps to reproduce

Build the setup in

[media]

Place a sand block under the observer
→ Notice the sand will land on top of the torch

Furthermore, if there is no torch, the sand will just drop as an item.

Linked issues

relates to

MC-165588 Falling blocks still convert to a block on a boat when there is a non-solid block underneath

MC-90523 falling_block entity floating on fences/walls

Attachments

MC-143894.mp4

MC-143894 (alternate setup).mp4

Comments

numeritos 2020-06-06T22:14:04Z

Affects 1.16 pre2

migrated 2020-06-18T08:59:06Z

Confirmed in 1.16 Pre-release 8.

pulpetti 2020-07-30T21:10:36Z

Affects 1.16.2 Pre-1

pulpetti 2020-07-30T21:19:04Z

Affects 1.16.1

migrated 2020-08-05T11:34:40Z

This ticket in progress ~500 days

Avoma 2021-01-13T12:05:32Z

Can confirm in 20w51a.

Kuba625 2021-01-27T11:02:26Z

625 days and not still resolved.

Avoma 2021-02-04T11:19:43Z

Can confirm in 21w05a. Also, @unknown, and @unknown, please be patient when waiting for tickets to be handled/fixed. The team are very busy people are some issues are more important than others, meaning that some will not be dealt with after a long amount of time. I assure you that this will eventually be handled when the team feels that the time is appropriate.

Avoma 2021-02-05T09:32:42Z

Can confirm in 21w05b.

Avoma 2021-02-11T14:55:18Z

Can confirm in 21w06a.

Avoma 2021-02-17T19:11:48Z

Can confirm in 21w07a.

Avoma 2021-03-20T13:27:26Z

Can confirm in 21w11a. Video attached.

Avoma 2021-04-29T08:47:46Z

Can confirm in 21w17a.

ampolive 2021-07-02T15:40:05Z

Can confirm in 1.17.1 Release Candidate 1.

ampolive 2021-07-31T19:43:22Z

Attached a video with an alternate setup based on MC-183171, if ever the first one stops working for some reason.