[MC-1720] Dropped items bounce on stairs, cauldrons, carpets and full / locked hoppers Created: 01/Nov/12  Updated: 19/Aug/17  Resolved: 17/Sep/15

Status: Resolved
Project: Minecraft: Java Edition
Component/s: None
Affects Version/s: Minecraft 1.4.3, Minecraft 1.4.5, Snapshot 12w50b, Minecraft 1.4.6, Minecraft 1.4.7, Snapshot 13w06a, Snapshot 13w07a, Snapshot 13w09a, Snapshot 13w09b, Snapshot 13w09c, Snapshot 13w10b, Minecraft 1.5, Minecraft 1.5.1, Snapshot 13w16b, Minecraft 1.5.2, Snapshot 13w17a, Snapshot 13w19a, Snapshot 13w21a, Snapshot 13w24b, Snapshot 13w26a, Minecraft 1.6, Minecraft 1.6.1, Minecraft 1.6.2, Minecraft 1.6.3, Minecraft 1.6.4, Minecraft 13w36a, Minecraft 13w36b, Minecraft 13w37a, Minecraft 13w37b, Minecraft 13w39b, Minecraft 13w41a, Minecraft 1.7.1, Minecraft 1.7.2, Minecraft 13w48a, Minecraft 13w48b, Minecraft 13w49a, Minecraft 1.7.3, Minecraft 1.7.4, Minecraft 14w03b, Minecraft 14w05b, Minecraft 14w06b, Minecraft 14w07a, Minecraft 14w08a, Minecraft 1.7.5, Minecraft 14w10b, Minecraft 14w10c, Minecraft 14w11b, Minecraft 1.7.9, Minecraft 1.8-pre1, Minecraft 1.8.1, Minecraft 1.8.3, Minecraft 1.8.4
Fix Version/s: Minecraft 15w38a

Type: Bug
Reporter: Rhys Gabriel Assignee: Unassigned
Resolution: Fixed Votes: 70
Labels: None

Attachments: GIF File Bounce.gif     File bounch-1.ogv     JPEG File screenshot-1.jpg    
Issue Links:
Duplicate
is duplicated by MC-5557 Bow on Stairs bug Resolved
is duplicated by MC-5901 The glitch bounce Resolved
is duplicated by MC-6600 Hoppers makes items jump when they do... Resolved
is duplicated by MC-6655 Stairs bug Resolved
is duplicated by MC-7230 Items bouncing on top of hoppers Resolved
is duplicated by MC-8087 Items bonce on stairs Resolved
is duplicated by MC-8169 hoppers weird with a wooden pressure ... Resolved
is duplicated by MC-8399 Bouncing Items on Top Of Hoppers Resolved
is duplicated by MC-8927 A dispencer bug. Resolved
is duplicated by MC-9408 Items Bouncing On Stairs Resolved
is duplicated by MC-9573 Kidane in the subject jumps up and do... Resolved
is duplicated by MC-10144 Jumping items Resolved
is duplicated by MC-10839 Bouncing items Resolved
is duplicated by MC-11228 Items often jump away when a player d... Resolved
is duplicated by MC-16809 When an item is dropped in a cauldron... Resolved
is duplicated by MC-17988 carpet bug Resolved
is duplicated by MC-19337 Items do not behave correctly if push... Resolved
is duplicated by MC-27191 Bouncing dropped-item bug. Resolved
is duplicated by MC-28174 Items bouncing on stairs. Resolved
is duplicated by MC-34219 Weighted pressure plate on powered ho... Resolved
is duplicated by MC-56128 Stairs make Item's Jump Resolved
is duplicated by MC-59348 Items thrown in cauldrons bounce out ... Resolved
is duplicated by MC-80443 Bouncing items Resolved
is duplicated by MC-1829 Item entities bounce on top of cauldrons Resolved
is duplicated by MC-2046 Dropped items bounce on top of cobble... Resolved
is duplicated by MC-3019 Throwing an item (pressing 'q') onto ... Resolved
is duplicated by MC-3049 Items can not be thrown into cauldrons. Resolved
is duplicated by MC-3572 Items and stairs buggy collision Resolved
is duplicated by MC-3685 Dropped items bounce on stairs forever Resolved
is duplicated by MC-3768 Jumping Items on stairs Resolved
is duplicated by MC-3810 The stair item...thingy! Resolved
is duplicated by MC-3832 Cauldron bouncing bug Resolved
is duplicated by MC-3878 Items thrown into cauldrons bounce Resolved
is duplicated by MC-4673 Dropped Items bounce when hitting the... Resolved
is duplicated by MC-4699 When an item is thrown at, or moved t... Resolved
is duplicated by MC-4737 Pistons throw item back Resolved
is duplicated by MC-4932 Dropped items bounce when dropped int... Resolved
Relates
relates to MC-89245 the items don't bounce of the stairs Resolved
relates to MC-15 Item drops drop into transparent bloc... Resolved
relates to MC-3513 Items Droped on fences jump around Resolved
CHK:
Confirmation Status: Confirmed

 Description   

Dropped items bounce on wooden stairs.



 Comments   
Comment by Kumasasa [ 17/Sep/15 ]

Fix confirmed.

Comment by [Mod] Michael Wobst [ 16/Sep/15 ]

I'm not able to reproduce it in 15w38a. Can someone else confirm/test if this is fixed?

Comment by Random Boomerang [ 02/Aug/15 ]

if this is fixed, I at least hope that they add an item that does this in a future version

Comment by Alex Campbell [ 31/May/15 ]

http://xkcd.com/1172/

Comment by Random Boomerang [ 23/May/15 ]

I actually like this feature!

Comment by KingSupernova [ 06/Mar/15 ]

How does this enable jump scares?

Comment by Travis Terwillegar [ 26/Feb/15 ]

just the idea of jump scares, or even the thought of popcorn or even cooking, we use it all the time on the server that I play on, and kinda run...

Comment by [Mod] Ezekiel (ezfe) [ 25/Feb/15 ]

1frogmaster98 what uses does it have in Map making?

Comment by Travis Terwillegar [ 24/Feb/15 ]

This is one of the bugs that I do not want fixed, it has a huge use in map making as well as cool effects when role playing in minecraft.

Comment by SuburbSomeone (lastname) [ 23/Aug/14 ]

Definitely a bug, but I'd take full advantage of it while we can (probably up until the first 1.9 snapshot)

Comment by Galaxy_2Alex [ 22/Aug/14 ]

http://i.imgur.com/qlwCaGU.png

Comment by Kawsiphek [ 22/Aug/14 ]

Galaxy_2alex, I did not think there was a 1.9 already. If you did not notice, I am reffering to the 1.8 prerelease that came out today. What was happened for me is if i throw an item into a stairway it seems to get pushed down the stairs well past the point where it should have landed.

Comment by Galaxy_2Alex [ 22/Aug/14 ]

Kawsiphek: It is not fixed for 1.8, it's fixed for 1.9.

Comment by Kawsiphek [ 22/Aug/14 ]

I can confirm this is still an issue in the 1.8-pre1 release. I can replicate this bug using stairs, cauldrons, and hoppers, but carpets seem fine.

Comment by Itouch2 [ 09/Mar/14 ]

Confirmed for 10c

Comment by Itouch2 [ 24/Feb/14 ]

Confirmed for 08a

Comment by Alex Campbell [ 07/Jan/14 ]

Grum said in IRC this was a feature. I really hope he was joking.

Comment by David Harmon [ 11/Oct/13 ]

Seen in 13w39b, with a powered hopper. I'd actually thought it was due to the weighted pressure plate I had atop it.

Comment by _zombiehunter [ 16/Sep/13 ]

Still a problem in 13w37b !

Comment by Victor Møller Pedersen [ 16/Sep/13 ]

Needs to be fixed already...

Comment by _zombiehunter [ 05/Sep/13 ]

Confirmed for 13w36a !

Comment by And Schw [ 28/Aug/13 ]

I know that this was atleast intentionally introduced for stairs to prevent Items from getting stuck in them. (If the stairs were used to create floor patterns)

Comment by Jesper the End [ 26/Jul/13 ]

Oh I thought you were talking about the rotation.

Comment by Timothy Oltjenbruns [ 26/Jul/13 ]

@Jesper In what sense do you mean "angle"? They obviously have angle of direction, which was what I spoke of in my previous comments. As for their collision box having rotation, I do not think so.

Comment by Jesper the End [ 25/Jul/13 ]

Do Items have an angle?

Comment by Timothy Oltjenbruns [ 25/Jul/13 ]

I think this would be a neat feature to add, because it adds the possibility of easier item transportation. There is a few "balancing" points to this bug already.

1. The item eventually loses momentum and stops
2. The item's angle matters, if it has the wrong angle it hits the edge and stops.

These two things make it harder to use item sewers, but allows drop transfer without lowering the destination height. I have made a few contraptions taking advantage of this bug, and working around the "balances." It took a huge system to align drops in the center of the stairs, and start their velocity off right, as well as a tricky water system inside pipes I made.

My opinion on this bug is that it should be turned into a feature, because I think it would make for some interesting and creative contraptions.

If this was to become a feature, I also propose a third balance that would only enable this bounce condition for sets of two stairs with their low end facing each other. Creating a channel-like block arrangement. I know this would probably be difficult because the bug likely relates to collision, and conditional collision is a tricky concept. Oh well, its just my thoughts on this bug. I hope it becomes a feature!

Here is a screenshot of a little "drop sewer" of mine: http://imgur.com/ZupmY7k

Comment by Madeline Miller [ 20/Jul/13 ]

Confirmed for 1.6.2

Comment by Jesper the End [ 30/Jun/13 ]

confirmed for 1.6.1

Comment by _zombiehunter [ 29/Jun/13 ]

Can confirm this for 1.6.1

Comment by [Mod] Ezekiel (ezfe) [ 29/Jun/13 ]

Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

Comment by _zombiehunter [ 25/Jun/13 ]

Still happens in 13w26a and 1.6-pre

Comment by Madeline Miller [ 25/Jun/13 ]

Any updates on this? I am hoping they fix this before 1.6.. I sent a tweet to Dinnerbone and Grum_ this morning but I don't think they saw it.

Comment by _zombiehunter [ 15/Jun/13 ]

Items also bounce on anvils, chests, etc. (tested in 13w24b). Don't get why this is still not fixed

Comment by Braeden Mollot [ 14/Jun/13 ]

Confirmed in 13w24b, I really hope this gets fixed, it is preventing me from releasing a slew of plugins.

Comment by Madeline Miller [ 04/Jun/13 ]

Any updates on this issue? It greatly effects my plugin CraftBook.

Comment by fake fakes [ 24/May/13 ]

Still in 13w21a

Comment by John Distler [ 18/May/13 ]

This bug is so awesome! I love watching the items bounce, bounce, bounce, bounce, bounce, bounce, bounce, bounce, bounce, bounce, BOUNCE!
There should be something that achieves this affect legitimately.

Comment by Kumasasa [ 18/May/13 ]

Done.

Comment by fake fakes [ 18/May/13 ]

Still in 13w19a. Could someone add cauldrons and full hoppers to the description?

Comment by fake fakes [ 30/Apr/13 ]

Happens in 13w17a on stairs, cauldrons and full hoppers.

Comment by Jesper the End [ 28/Apr/13 ]

confirmed

I also noticed this happens for every block actually, but just very slightly. This affects only for a frame but doesn't make any difference for the actual position of the item

Comment by fake fakes [ 11/Apr/13 ]

I can confirm for 1.5. Also happens to cauldrons.

Comment by Callum Evans [ 18/Feb/13 ]

I can confirm in 13w07a.

Comment by Cat [ 28/Jan/13 ]

Hoppers that are deactivated by a redstone charge also bounce items around.

Comment by Leomckitten [ 23/Dec/12 ]

If you throw an item across some ice at upside down stairs, it should slide through the ice but instead bounces back. I assume this is the same bug.

Comment by Niels Hakkers [ 04/Dec/12 ]

Upside down does the same, Etho has accoutered the problem too: /watch?v=1qcxJClC99w

Comment by Victor Møller Pedersen [ 27/Nov/12 ]

Not limited to the top of the stairs either. I discovered it when trying to convey items under stairs with water currents. Described in detail in duplicate: MC-3572 Items and stairs buggy collision

Comment by Ian Carlson [ 27/Nov/12 ]

Works on any stair position, items will keep velocity and [ some ] direction when bouncing:

http://www.youtube.com/watch?v=IR2EBUOaW5w

Comment by Kumasasa [ 26/Nov/12 ]

Updated title. The material of the stairs doesn't matter

Comment by Cyber 1337 [ 03/Nov/12 ]

I made a video about this bug: https://www.youtube.com/watch?v=HThlFWCE3RA

Comment by Carl Fürstenberg [ 02/Nov/12 ]

video of bounching items (looks pretty funny, could be a "feature" )

Comment by ANBO Motohiko [ 02/Nov/12 ]

Maybe regression caused by MC-15.

Comment by ANBO Motohiko [ 02/Nov/12 ]

I have same issue in MC 1.4.3 pre.

I threw wool blocks, blue and gray wools bounce again and again,
and light gray one runs over 15 blocks away. All of blocks are thrown (by Q key)
from same point,.

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