1. Update WordPress and theme
Make sure you have the newest version of WordPress and that your theme is up to date. Using outdated software might cause problems with how things work together.
2. Clear browser cache
Your browser's saved data (cache) might be the reason. Try clearing the cache and reloading the theme editor page to check if the missing patterns come back.
3. Test with the default theme
Try temporarily using a basic WordPress theme, like Twenty Twenty-One, to check if the problem continues. If patterns show up with the default theme, it could be an issue specific to your current theme.
4. Deactivate plugins
Deactivate all plugins and see if the issue with missing patterns is still there. If the problem disappears, switch on each plugin one at a time to find out which one might be causing the conflict.
5. Check for javascript errors
Access your browser's developer tools (you can usually do this by pressing F12 or right-clicking and choosing "Inspect"). Once there, head to the "Console" tab. Look for any JavaScript errors that might be stopping the patterns from showing up.
6. Custom code
Check if you've added any custom code to your theme or functions.php file. Take a closer look to make sure no mistakes or code could cause issues with the theme editor.
7. Contact the theme developer or Support
If the solutions mentioned earlier don't solve the problem, get in touch with the developer or support team of your theme. They could be aware of the issue and offer a solution or release an update to address it.
