How to reproduce bug:
Create a creative warm ocean buffet world.
Place a block using a command so that you can start building in the first block layer of the ocean.
Using any block, start building from that point.
This also happens more noticeably when I use the following command in a command block: execute at @p if block ~ ~-1 ~ minecraft:water if block ~ ~ ~ minecraft:air run setblock ~ ~-1 ~ minecraft:white_concrete
Comments 5
Well, I'm sure it's a light calculation issue, but it is definitely not a dupe of MC-128299--, as no chunks of bad lighting are happening. I've also noticed that this happens even when I am placing my blocks on top of a large platform that I have built, which makes me believe that this is not just happening because of the water.
More likely caused by MC-130530.
I'm pretty certain it's not caused by MC-130530 because the lag only happens when the block is placed. Also, this happens to me on land as I've found out recently. So I'm certain that this is a lighting issue.
Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report (minecraft/crash-reports/crash-<DATE>-client.txt) here.
(If I'm not mistaken) The lag is probably caused by weird lighting updates. If that is so, this is a duplicate of MC-128299
In case you don't know what I am talking about, look below your feet in an ocean after trying to reproduce MC-131036