opengl painters pixelated markers

Hello,

I am using Macbook Pro 16 inch 2019. It has 2.1 opengl when I check via opengl info commadn in matlab,

Until Recently everything wa fine, however now I am getting weird shapes with markers of the figures.

I am now changing renderer to painters,

I have 2 questions:

Why it happened?

Will it affect performance of MATLAB? Changing it to painters I mean.

Thanks.

opengl

painters: