On Mon, May 01, 2023 at 10:08:44PM +0800, Hongyi Zhao wrote:

[...]

> I changed to the following setting and the problem discussed here has
> been fixed:
> 
> (use-package company-math
>   :hook
>   ;; This will enable the company-math backend for LaTeX mode
>   (LaTeX-mode . (lambda ()
>           (setq-local company-backends
>                   (append '((company-math-symbols-latex company-latex-commands))
>                       company-backends))))
>   )

Glad you found it :)

Cheers
-- 
t