When you use the WordPress classic editor (which for me still works far better than the Gutenberg one), avoid at all cost the use of the [Wayback/Archive] SyntaxHighlighter Code Block – Page 2 – WordPress.com Support.
Each time you switch between from Text View back to Visual, some characters are html-encoded, like:
&becomes&>becomes>
Switching twice makes & into &>.
Switching three times makes & into &&&gt.
I already explained why to avoid the Gutenberg editor in Bookmarklet to force WordPress classic-editor.
Via:
- [Wayback/Archive] SyntaxHighlighter Code Block – WordPress.com Support
- [Wayback/Archive] Code Block – WordPress.com Support
- [Wayback/Archive] wordpress code block language classic editor – Google Search
–jeroen
The Wiert Corner - irregular stream of stuff 