Comparators not updating when items are pulled from doublechests

[Baalhug]

This is a problem that happened before, but according to github it was fixed in 2017. Well, it was not. Depending on the side of the chest the removed item is, comparator will update or won't. It will happen only if removed by a hopper or minecart with hopper. If you remove items manually it works good.

[DaemonUmbra]

Can you specify a Minecraft version and a Forge version? (Please don't use words like "latest")

[RescueGum]

i can confirm this bug,

replicated in: forge-1.15.2-31.1.0 (recommended) and forge-1.15.2-31.1.47 (latest as of today) [no other mods installed]

 

this bug does NOT occur in vanilla minecraft 1.15.2

 

bug description:

when items are pulled from doublechests with a hopper/hopperminecart, comparators going 'out' of this double chest do not update properly, until the doublechest is opened (and thus itself block-updated) by the player manually.

i noticed that basically only the 3 comparators going out of the corresponding half (*) of the doublechest from which the last item was pulled update correctly and the 3 comparators on the other side no not update. it does not matter from which side of the doublechest the items got pulled by a hopper, only in which half the last item was located inside the chest.

(* standing in front of a doublechest, the 'left halft'/'left block' of the inventory corresponts to the top 3 inventory rows of this chest, and the 'right half' of the chest to the bottom 3 inventory rows)

Edited April 22, 2020 by RescueGum

[iamtheomen]

I have come across this bug and therefore it makes building certain redstone structures pretty hard.

 

I tested this in Minecraft 1.15.2  Forge version 31.2.0  no other mods installed just forge.

 

This does not happen in a vanilla game

 

any chance of a fix? I like to run forge so i can run map mods on a vanilla game basically but cant as this breaks some of my redstone contraptions 

 

Edited May 16, 2020 by iamtheomen

[YellowInTheRealm]

Is there any chance this bug will be addressed and corrected in the next stable 1.16 forge version? I've just finished a huge silos system in a server with my buddies and it ain't work... because of this bug, it's so frustrating. It would also break other automated systems I'd like to build and the workarounds are sometimes doable but really annoying to perform, forcing me to reproject often the whole thing. We play with almost no mods so if this problem won't be fixed I'd rather play pure vanilla, but it would be quite sad because of a couple of mods we love playing with (Better Crafting Table is my favourite).

 

I've tried the latest version with no mods in a new 1.16 world (forge-1.16.1-32.0.24) and the bug is still there.

Edit: I created a new thread, since this bug affects the latest forge version:

 

Edited June 28, 2020 by YellowInTheRealm
Bug found in the latest version, added a link to a new thread.

[sciwhiz12]

I confirm that this issue exists on 1.16.1 and 1.15.2 latest forge versions as of writing this post, using hopper insertion. Filed a bug report (MinecraftForge#6873)

[Curle]

Keep an eye on the PR for 1.15: https://github.com/MinecraftForge/MinecraftForge/pull/6874

And the PR for 1.16: https://github.com/MinecraftForge/MinecraftForge/pull/6875