Joomla 3. In the content editor, the "Details" button cuts off part of the HTML code. How to overcome?

Question

Joomla

If the article is published in full format, then everything is displayed correctly. And if you hide part of the article with the "more details" button so that only the introductory text is visible on the main page, then the engine does not see part of the hidden code of the article on the main page (for example, closing tags

Answer 1

Close tags and open again.

Answer 2

The question didn’t fit completely ... In general, tags (for example, div) hidden in the editor are not seen by the engine on the main page and the layout breaks