I am trying to move the avatar into the media body title, because on mobile phones reading nested comments is impossible. So, just trying some new styles. Why does moving the avatar break all the nesting in the comments?
Comments use the BS media object:
Abstract object styles for building various types of components (like blog comments, Tweets, etc) that feature a left- or right-aligned image alongside textual content.
If you don’t want to have the avatar, you should update the comment markup to not use the media object markup.
Also, it is possible to set avatar size to 0 editing the arguments array of
wp_list_comments at templates/comments.php:
<?php wp_list_comments(['style' => 'ol', 'short_ping' => true, 'avatar_size'=>0]); ?>