[MC-10653] Comparator's back redstone torches blink when toggling front torch and receiving input from a container

The Bug

When a comparator is facing away from a chest with something in it, and you right-click the comparator to make the third redstone torch deactivate, the back two torches will blink off sometimes. Also, the comparator will switch to the unpowered state, as can be seen be using f3.

Steps to Reproduce

Place down a chest and some items inside of it.
Place down a comparator beside the chest so that it receives a redstone signal from it.
Switch the mode of the comparator constantly by right-clicking it.
Take note as to whether or not powered comparators momentarily become depowered when switching their mode.

Observed Behavior

Powered comparators momentarily become depowered when switching their mode.

Expected Behavior

Powered comparators would not momentarily become depowered when switching their mode.

Linked issues

duplicates 1

MC-12949 Minecraft ran out of memory: java.lang.OutOfMemoryError Resolved

is duplicated by 4

MC-19050 Redstone comparator is when right click twinkle by hopper (activity comparator) Resolved

MC-59371 Comparator bug when using for checking items in container Resolved

MC-108286 comparator something I guess Resolved

MC-275886 Comparators detecting block inventory flicker off when switched from subtract to compare Resolved

Attachments

MC-10653.mp4

Comments 50

kumasasa 2013-03-01T19:34:17Z

Confirmed.
The comparator not only blinks with the back torches, it switches also short to the off state.

_zombiehunter 2013-06-25T15:11:08Z

Confirmed up to 1.6-pre, also happens with hoppers

_zombiehunter 2013-06-28T15:32:43Z

Confirmed for 1.6.1 !

_zombiehunter 2013-07-05T21:15:32Z

Confirmed for 1.6.2 !

_zombiehunter 2013-09-05T19:42:58Z

Confirmed for 13w36a/b !

40 more comments

Avoma 2021-06-16T19:00:14Z

Can confirm in 1.17.

Avoma 2021-11-06T10:30:51Z

Can confirm this in 21w44a. Here are some extra details regarding this problem.

The Bug:

Powered comparators momentarily become depowered when switching their mode.

Steps to Reproduce:

Place down a chest and some items inside of it.
Place down a comparator beside the chest so that it receives a redstone signal from it.
Switch the mode of the comparator constantly by right-clicking it.
Take note as to whether or not powered comparators momentarily become depowered when switching their mode.

Observed Behavior:

Powered comparators momentarily become depowered when switching their mode.

Expected Behavior:

Powered comparators would not momentarily become depowered when switching their mode.

Avoma 2022-05-15T11:18:20Z

Can confirm in 1.18.2 and 22w19a.

Avoma 2022-06-08T13:31:38Z

Can confirm in 1.19. The issue here is that comparators that receive power from containers with items in them sometimes change their "powered" block state momentarily when altering their mode.

Avoma 2022-09-14T19:19:27Z

Can confirm in 1.19.2.