In reply to Amir Helzer.

It’s a grossly frustrating situation to be in and I for one sympathise with any developer that has to spend hours firefighting the mess that Gutenberg is when they good be putting their time to better use.

Even on themes that purport to be built for Gutenberg, it doesn’t function properly

Therefore I suggest that theme developers slap add_filter( ‘use_block_editor_for_post_type’, ‘__return_false’, 100 ); into the functions.php file to clobber Gutenberg as a form of protest till it conforms to a properly functioning piece of software.