A white bug that appears in 16.210.58

I have been played minecraft from last year but I can't able to find any bug but I found the bug in new version of minecraft that is 1.16.210.58 beta the bug is whenever I load the world then I see a white colour around the world I haven't any shader in this version so please help me make another updates 1.16.210.59 beta for low end devices pls help me mojang