Editing block-based content in Classic Editor causes layout loss.
Classic Editor Doesn’t Support Modern Blocks
Key Points: Switching to Classic Editor removes Gutenberg layout or block formatting.
You used Gutenberg to craft a gorgeous layout. But someone opens the same post in Classic Editor — and the blocks fall apart. Columns become paragraphs. Buttons become plain text.
💥 Why This Happens
- Classic Editor parses all content as HTML — not block markup
- Block comments are lost, destroying layout structure
- Visual styling is ignored in the Classic TinyMCE editor
🛠️ Advice
- Stick to one editor for the life of a post — switching causes data loss
- Disable Classic Editor for users who don’t need it
- If needed, convert Classic content to blocks instead of the reverse
🛑 Note
Mixing editors is like mixing potions — don’t be surprised when something explodes.