I have noticed some of my older blogs and comments have some of their $$$\TeX$$$ mathematical expressions incorrectly rendered in their own line instead of in the line of text, which can be really distracting to read.
Examples: https://codeforces.com/blog/entry/72593 ($$$\mathbb Z /p \mathbb Z$$$, and the large numbers in the spoilers)
https://codeforces.com/blog/entry/73211#comment-575285 This comment had it especially bad
I'm not sure what the cause of this is, and there is no discernible pattern as to which expressions and comments are affected.
Upd: It also affects others' comments too, like: https://codeforces.com/blog/entry/73211?#comment-575152