Field editing permissions

Hello. Can someone help me? The site allows users to add content. If an admin edits the content, the user loses the ability to edit their own content. How can I enable the user to edit their own content if the admin has made changes to it?

Interestingly, only one field — the main body text — becomes inactive, while all other fields remain editable. No additional modules for permission settings are installed. Drupal 8.

Screenshot below: