[MC-3582] Trapdoors are not toggled by pressure plates on slabs Created: 21/Nov/12  Updated: 04/Dec/19  Resolved: 03/Dec/19

Status: Resolved
Project: Minecraft: Java Edition
Component/s: None
Affects Version/s: Minecraft 1.4.5, Minecraft 1.4.6, Minecraft 1.4.7, Snapshot 13w10a, Snapshot 13w10b, Minecraft 1.5, Minecraft 1.5.1, Minecraft 1.5.2, Snapshot 13w18c, Snapshot 13w19a, Minecraft 1.6.1, Minecraft 1.6.2, Minecraft 1.6.4, Minecraft 1.7.1, Minecraft 1.7.2, Minecraft 13w47e, Minecraft 13w48a, Minecraft 13w48b, Minecraft 13w49a, Minecraft 1.7.3, Minecraft 1.7.4, Minecraft 1.7.5, Minecraft 14w11b, Minecraft 14w26c, Minecraft 1.8, Minecraft 1.8.1, Minecraft 1.8.8, Minecraft 15w46a, Minecraft 1.10.2, Minecraft 16w32a, Minecraft 16w32b, Minecraft 16w33a, Minecraft 16w35a, Minecraft 16w40a, Minecraft 16w41a, Minecraft 16w44a, Minecraft 1.11 Pre-Release 1, Minecraft 1.11.2, Minecraft 17w06a, Minecraft 17w15a, Minecraft 17w16b, Minecraft 17w17b, Minecraft 17w18b, Minecraft 1.12 Pre-Release 2, Minecraft 1.12, Minecraft 18w46a, Minecraft 18w47a, Minecraft 18w47b, Minecraft 18w48a, Minecraft 18w48b, Minecraft 18w49a, Minecraft 18w50a, Minecraft 19w03c, Minecraft 19w04a, Minecraft 19w07a, Minecraft 19w11a, Minecraft 19w12a, Minecraft 19w12b, Minecraft 19w13a, Minecraft 19w13b, Minecraft 19w14a, Minecraft 19w14b, Minecraft 1.14 Pre-Release 2, Minecraft 1.14 Pre-Release 5, Minecraft 1.14.2 Pre-Release 3, Minecraft 1.14.3 Pre-Release 3, Minecraft 1.14.3 Pre-Release 4, 19w35a, 19w36a
Fix Version/s: Minecraft 17w47a

Type: Bug
Reporter: No User Assignee: Unassigned
Resolution: Fixed Votes: 49
Labels: trapdoor

Issue Links:
Duplicate
is duplicated by MC-11173 Door closes on near redstone update Resolved
is duplicated by MC-13014 trapdoors dont receive power on half ... Resolved
is duplicated by MC-14859 Trap Door & Doors Closes On Redstone ... Resolved
is duplicated by MC-16715 Fence gates close with pistons Resolved
is duplicated by MC-18220 Tripwire hook send redstone signal door Resolved
is duplicated by MC-19535 Redstone inconsistently affects track... Resolved
is duplicated by MC-25919 Trap Doors close on the block trip wi... Resolved
is duplicated by MC-29839 Placing redstone dust on a block clos... Resolved
is duplicated by MC-41049 When an unpowered redstone switch is ... Resolved
is duplicated by MC-44238 Trapdoors open and close by themself Resolved
is duplicated by MC-46392 Tripwirehook open Trapdoor Resolved
is duplicated by MC-46561 Redstone signal on barrier to trapdoors Resolved
is duplicated by MC-50684 Redstone Door Bug Resolved
is duplicated by MC-51174 Redstone - Wood Trapdoor Resolved
is duplicated by MC-51631 Junction rail incorrectly returning t... Resolved
is duplicated by MC-59765 Redstone repeater under open trapdoor Resolved
is duplicated by MC-77454 Trapdoor Opening Without Power Resolved
is duplicated by MC-92702 Repeater powers trapdoors when inactive Resolved
is duplicated by MC-105361 Trapdoors When the Block Below Them U... Resolved
is duplicated by MC-117702 Trapdoor closes on redstone update (n... Resolved
is duplicated by MC-119408 open wooden trapdoors close when upda... Resolved
Relates
relates to MC-114965 Placed tripwire hook updates blocks a... Resolved
relates to MC-115322 Updating string line in front of unat... Resolved
relates to MC-7344 Trapdoor is closed when redstone repe... Resolved
relates to MC-76111 Doors behave inconsistently when rece... Resolved
relates to MC-84173 Trapdoors get a redstone update when ... Resolved
relates to MC-2298 Placing fence gates right beside a re... Resolved
CHK:
Confirmation Status: Confirmed
Category:
Redstone

 Description   

A pressure plate on a slab will not open a trapdoor, but will close an open one. Doors work as expected, pressure plate on a slab will open them. wood and stone pressure plates act the same, and all types of slabs the same.

What I expected to happen was...:
I thought that a pressure plate on a slab would open the trap door

What actually happened was...:
the trap door did not open

Steps to Reproduce:
1. put down a slab level with the top of a block
2. place a pressure plate on the slab
3. place a trap door on the same level, on the slab or appropriate block
4. walk on to the pressure plate
5. an open trapdoor will close, a closed one will do nothing.



 Comments   
Comment by [Helper] Jack McKalling [ 03/Dec/19 ]

The issue described in this ticket is actually the trapdoor closing to the pressure plate, as it not opening through the slab is intended. This was finally fixed in a 1.13 snapshot, I presume due to new blockstates.

Comment by Connor Steppie [ 04/Sep/19 ]

Can I have my ownership of this ticket revoked? Don't want to deal with it anymore.

Comment by Fabian Röling [ 28/Apr/19 ]

I just tested it: Upper slab, pressure plate on top, trap door next to the pressure plate, open trap door manually, step on pressure plate, step off pressure plate. Result: Trap door closes.

The case in the screenshots does indeed not apply anymore, can someone remove them, please?

Awesoman3000 What do you mean with three reports in one?

Comment by [Mod] NeunEinser [ 28/Apr/19 ]

The report is only about trapdoors, so fixed?

Comment by RedCMD [ 28/Apr/19 ]

Can confirm fixed in 1.14 for trapdoors/doors/fence gates

Comment by Connor Steppie [ 18/Nov/18 ]

Affects 18w46a (at least the trapdoor thing does - why are there like three bug reports crammed into one here?)

Comment by branza [ 15/Mar/14 ]

Fixed only for doors in 14w11b.

Comment by megashub [ 12/Aug/13 ]

Can this issue please be updated to include 1.6.2 and Survival mode as well?

Comment by John Distler [ 16/May/13 ]

Confirmed in 13w19a.
Very annoying behavior. Not very usable in redstone contraptions. Should be fixed ASAP!

Device to replicate this:
! = Door/Trapdoor/Fence Gate
O = Redstone
+ = Block
8 = Button

!
+
OOOOOOO+8

Open the door/trapdoor/fence gate and press the button.

Comment by Kwin van der Veen [ 19/Apr/13 ]

I just did some tests with other "block updates", since in a certain way it does make sense that a (trap)door which has been put into a "bad" state by a player would change to the "right" state when receiving a block update.

There are some inconsistencies. When I open an unpowered (trap)door (so by a player) it will close again if there is a redstone block update, but not if there are other block updates like placing/removing a block. But when it is the other way around, so when I close a powered (trap)door it will open again with any block update.

Comment by Dranitsin Roman [ 06/Mar/13 ]

Same with wooden doors.

Comment by Tails [ 06/Mar/13 ]

Main issue: any redstone update close to a door/trapdoor/fence gates causes it to update.

Comment by George Randall [ 18/Feb/13 ]

Since the top-slab is not a whole block, I would think it shouldn't transmit redstone signal at all. So, what I would expect to happen would be that the trap door doesn't move at all.

I think the bug here is that an open one is closing.

Comment by [Mod] CubeTheThird [ 25/Nov/12 ]

Can confirm.

Generated at Sun Jan 12 12:01:42 UTC 2025 using Jira 9.12.2#9120002-sha1:301bf498dd45d800842af0b84230f1bb58606c13.