When I started my world normally, the game colors looked very muted, or very dark as if I had Vibrant Visuals active when I don't.
It happened every time I entered a world, and it didn't matter if I exited the game and started it again to play the world, it always looked like that.
I don't understand why trying to disable and enable Vibrant Visuals didn't change anything. I tried setting the graphics to the minimum, but that didn't work either.
Items in hand also pass through blocks in front of you in first person; this happens with all items.
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