There are some MathJax codes having imperfect appearances after/when being rendered.
I mention two of them with some examples (I do not have enough time to check others). Since I cannot upload any image on Codidact networks, as I reported the related bug on Meta earlier, I use some sharing website to show the related images. I also mention the perfect images of the rendered codes on Math Stack Exchange for comparison.
- Overbrace and Underbrace; <br> On Math Codidact:$$\overbrace{x+y+z}$$ <br> On Math Stack Exchange: https://pasteboard.co/JuPorO3.jpg
- Commutative Diagrams; <br> On Math Codidact: $$\begin{CD} A @>a>> B \\\\ @V b V V= @VV c V \\\\ C @>>d> D \end{CD}$$<br> On Math Stack Exchange: https://pasteboard.co/JuPrB1z.jpg
