Unable to disable Gutenberg core block styles

I have tried to disable the core styles for the Button component in the editor and add my own default classes.

I implemented the following JS code:

wp.domReady( () => {
	wp.blocks.unregisterBlockStyle(
		'core/button',
		[ 'default', 'outline', 'squared', 'fill' ]
	);

	wp.blocks.registerBlockStyle(
		'core/button',
		[
			{
				name: 'primary',
				label: 'Primary one',
				isDefault: true,
			},
		]
	);
} );

This gives weird results because the unregisterBlockStyle function is found but it doesn't do anything. The registerBlockStyle function works fine and the new style is added.

Running the same unregisterBlockStyle JS code in browser console removes the buttons correctly.