I sat by that door many times. Did the whole door go in which it’s likely someone would of been sucked out of not wearing a seat belt. The windows are too small but the problem is if your head got pulled through and couldn’t breath plus unprotected from anything and passengers couldn’t pull them back in fast. And what’s next to the windows their head.
This sounds from little I heard a manufacturing error or negligence of proper safety building steps missing some step when making it.