“remove_theme_support” for Patterns

Hey there, I’m using this function in a custom theme with the following code to stop core patterns from .org from the pattern inserter:

//  Disable core patterns
add_action('init', function() {
    remove_theme_support('core-block-patterns');
});

It works and removes the patterns that are normally pulled in from https://wordpress.org/patterns/

But, there are still 7x patterns being shown that are not in the theme – I’ve tested this on a completely empty theme with just a functions.php added that contains the code above.

There’s 6x random “post” patterns and 1x random “call to action” pattern – theme file is here: https://drive.google.com/file/d/153BZZUR-NJx7KFqKHDVUoiBZNylPeLyQ/view?usp=sharing

Bit of a head scratcher this one, any feedback would be appreciated!

Cheers!

Jakson