When you enable spectator mode and fly underground, the fade in animation causes chunks to flicker when loading.
To reproduce:
Create a world
Change your game mode to spectator (or simply find a cave)
Go underneath
See the flickering (use F3+A to reproduce)
Expected result:
See 2nd attachment (Chunks Fade In)
Actual result:
See the 1st attachment
Thank you for your report!
After consideration, the issue is being closed as Won't Fix.
Please note that this is not the same as Working as Intended, as this bug report correctly describes behavior in the game that might not be the intended or desirable behavior, but it will not be fixed right now. Sometimes, this is because the issue reported is minor and/or impossible to change without large architectural changes to the code base.
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