Rendering Bug

I was about to explore the dessert temple and this happened.
The image shown bellow is that i actually was going to explore the dessert temple.
another second thing is that i actually go near to it it becomes invisible?

and when i break a block it just render it but still some of the terrain is invisible?
when i tried to adjust my render distance it just render it back to normal?

All the image i used was using snipping tool to get it