Xinyue Zhang

Apart from servers, this seems to be also happening in single player world, a famous one actually, which is the 10 years anniversary map.

But only one chunk goes dark after I quit and reopened the world, and I'm not sure why there is only half of it being completely dark...

Version 1.14.1 release.

My world is created in 1.14 pre 1, and I'm using "--forceUpgrade --eraseCache" everytime when I upgrade/redtart my server, but this bug still happens everytime.

As far as I know, this bug is most likely to betrigged when a player logs in or comes out from a nether/end portal, while travelling around seems to have nothing to do with this. What's more, the chunks going dark are always the same chunks, no matter how many times I erase the cache or restart the server. And the scale of this bug in 1.14.1 pre 2 seem to be way larger than what it was before 1.14.1 pre 2, with hundreds of  continuous chunks went dark at the same time.

I think that you are talking about MC-142134, in which no light appearing around light sources.

In MC-149518, everything described there seems to be identical to this ticket.

And there are two issues shown in my screenshot: on the right-hand side, no light is appearing around light sources, which is reported in MC-142134; on the left-hand side, skylight is shining through the concrete roof, as shown in the F3 screen, which matchs the description of both this ticket and MC-149518, I think.

Thanks for pointing that out. I just went to check that out, but I'm still quite confused with the difference between these two bugs...

The world was created in snapshot 1.14 pre 1, and yes, I use "--forceUpgrade --eraseCache" option every time when I update/restart my server.

Skylight shining through blocks and light sources not working are happening at the same time, forcing me to switch the difficulty to peaceful.

My entire house went pitch black, even my beacon beam! Why does the pink beacon beam turned black as well! (But you can still see some pink-ish color in the black beam)

It seems to be worse in 1.14.1 pre 2. Hundreds of (maybe thousands of) chunks went dark at the same time, making a whole island into a mob farm! Have never experienced this bug at this scale! 😞

Not sure why this is labeled "Fixed", but it seems that this bug still exists in 1.14.1 pre 2, as shown in the screenshots.