Y. E. via "General discussions about Org-mode." <emacs-orgmode@gnu.org>
writes:

> Hello,
>
> I tried configuring 'org-format-latex-options' per a org-mode
> file/directory by adding the following configuration into the
> .dir-locals.el file:
> The file settings I use:
>
> #+STARTUP: content latexpreview
> #+OPTIONS: tex:dvisvgm html-style:nil
> #+HTML_HEAD: <link rel="stylesheet" type="text/css" href="style.css" />
>
> The LaTeX formulas are embedded into the text as shown here:
> https://orgmode.org/manual/LaTeX-fragments.html
>
> Am I overlooking something?

Nope. This is a bug.

It happens because LaTeX fragments are processed in temporary buffer and
all the buffer-local variables you set in the original org buffer are
discarded.

The fix is attached.

Nicolas, this kind of error might be present in various places of export
library. You may want to fix it in more places than what I propose in
this patch.

Best,
Ihor