PHP Front-End Editor Reload Issue

I'm facing an issue where my PHP front-end editor disappears after saving. This issue is persisting despite no recent changes to the code or configuration. However, the site has moved to a new server.

I DO NOT want to update any core code, I simply want to have the issue diagnosed and hear your solution before moving forward. The site is an OLD outdated Joomla system that is highly modified. We can tweak things, but we will NOT update or change any CMS libraries. Simple syntax or JS issues can be fixed..

If you want to be considered, please write in your message, NO CORE UPDATES, otherwise I'll ignore your bid. I do not like automated bidding on my projects, as it shows you're not reading the project details.

Key Requirements:
- The editor window should remain visible after clicking SAVE.
- The editor should reload with the new content after saving.

Ideal Skills:
- Strong understanding of PHP.
- Experience working with front-end editors.
- Troubleshooting skills to identify the root cause of the disappearing editor issue.
- Knowledge of how to maintain the editor's visibility.
- Ability to ensure the editor reloads with the saved content correctly.

Your completion of this task will greatly improve the usability and functionality of the editor.