all blocks are black except entities

When I play 1.16 and up there is alot of black blocks. Below 1.16 I can set mipmap levels to off and it would run completely fine.

It used to be completely fine but after a bit it suddenly started happening and italso happening on my second computer (wich has intel I5 16 gigs of ram and intel graphics)

(mind I said "It used to be completely fine" I did not change hardware. infact, I changed nothing and the probably just suddenly started happening)

 

I looked on youtube for a solution and found a video explaining how to solve it by turning mipmap levels to off on 1.7.4 but I saw people in the comments saying it didnt work on 1.16.