There are no LTS supported versions of Nuitka, but mostly the stable version is hot-fixed, and would be for security issues. If possible, git rebases would be done just as they are for corruption bugs, which would then allow to use these, but usually newer Nuitka is the expected to use version, with main always being as bug free as possible.

When you email me at kay.hayen@gmail.com with a well defined report, I guarantee a reaction within 72h, and correction as soon as possible. Generally private emails are not acceptable for questions, there I would point to GitHub, but for sensitive information only, it's great.