OS: Windows 11 Anki-desktop: 2.1.49(dc80804a) Anki-desktop: 2.1.50 with qt6
When I use the “HTML Editor” function in 2.1.49, the “<style>…</style>” element is deleted after editing.
The style element is deleted even I never use the “HTML Editor” in 2.1.50.
I think CodeMirror (the JS library for the new HTML editor) strips <style> tags by default and this behavior was kept intentionally. Styles belong in the CSS section of your note template.
<style>
If you want to apply CSS to the field contents in the editor, you could use my add-on CSS Injector - Change default editor styles - AnkiWeb.