Featured Image issue

I don’t know how to solve this problem. After the new WP 6.3 update, Twenty Twenty’s visual settings are ruined. It started to crop all the featured images I uploaded to 1200px. I upload a 4000 px image but it is indexed as 1200px in google.

This started to happen after the update. It crops even though we use the following setting:

add_filter( ‘big_image_size_threshold’, ‘__return_false’ );

How do we solve this problem. Because in WordPress Image settings, small, medium and large settings are set to 0px. There should be NO crop in any way.