[MCPE-175056] Chunk-wide block rendering lag triggered by block updates along chunk borders after 1.20.30.24 beta

MCPE-175056 is a clone of MCPE-173706.

With the 1.20.30.24 beta update, blocks have drastically improved block rendering, however there is a slight lag in block rendering

[media]

, this is most noticeable with redstone dust and redstone torches though it can also be seen with other blocks. Added a new world much better than the old one to make it much easier to reproduce this incident.

Steps to reproduce:

Open

[media]

Activate the lever
When you see the blocks are visually lagging, jump

The observed result:
The blocks have a visual delay when you remain static.

The expected result:
The blocks have no visual delay when you remain static.

Linked issues

relates to 1

MCPE-173706 Chunk-wide block rendering lag triggered by block updates along chunk borders Resolved

Attachments

Beta 1.20.30.24 (MCPE-173706).mp4

World compatibility 1.20+ (MCPE-173706 and MCPE-175056).mcworld

x-ray.mp4

Comments 8

Arisa Bot 2023-09-18T22:04:23Z

⚠️ Please do not mark Unreleased Versions as affected. You don't have access to them yet.

_{-- I am a bot. This action was performed automatically! If you think it was incorrect, please notify us on}_Discord_or_Reddit

GoldenHelmet 2023-09-19T04:23:19Z

The attached world does not really show the issue because observer updates are limited server-side by the pendingTick cap. Out of the 2700 observers inside the focal chunk, only 100 can update on any given tick. Given the random update order, the flickering dust in the test world is consistent with server-side updates and does not imply visual update are delayed or inconsistent. Can you attach a world that reproduces the bug without using more than 100 observers?

Timer RP 2023-09-19T16:20:01Z

I have already updated the world to reduce the use of observers and added another structure to reinforce the report😉.The world is compatible with 1.20.15+ since it uses chunker.app.To increase the version compatibility with versions lower than beta 1.20.30.24 , although I recommend loading the world in beta 1.20.40.21.

Timer RP 2023-09-19T16:44:51Z

I have updated the world again and it is now compatible with beta 1.20.40.21 or higher due to the fact that the portal was broken.

GoldenHelmet 2023-09-20T19:21:48Z

I can confirm the behavior described in Windows 10. The visual block update delays/skips are much less than occurred in 1.20 to 1.20.15 with MCPE-173706, but they do occur in the same way and jumping or free falling still restores expected visuals. I think this may match behavior from before 1.20, where redstone dust visuals could get laggy but it wasn’t ever bad enough for anyone to figure out the connection to chuno borders and jumping/falling.

Timer RP 2023-09-20T22:03:10Z

It can still cause x-ray if you break and place a block multiple times, as shown in

[media]

Marian Ruth Reiley 2023-09-21T16:01:25Z

Even after 1.20.30 went live two days ago I still get lag. Also would like to add that mob spawning and recipee discovery are also causing lag. Reboot and reinstall did not resolve the issue.

[MCQA] v-magwar 2023-10-16T15:00:21Z

As per ADO, closing as Won't fix.
The behavior here is expected and has been in the game since the introduction of the render chunk system. The root cause of the issue is that the hardware cannot keep up with what they are trying to do in game.