What's the issue you encountered?

Issue server side, lighting in the nether starts flickering constantly.

How can the issue be reproduced?

Just opening the server and playtesting the nether.

Logs

No response

Additional information

There was no log indicating this flickering issue

Fixed in version 1.6.

Should be fixed in the next update. If it is causing you trouble you can set your render distance in the nether above 7, this should solve it temporarly