Replaced
if(get_post_meta($this_post_id, 'anonPost', true) == 'true'){
//...
}
else{
return get_the_content();
}
with
if(get_post_meta($this_post_id, 'anonPost', true) == 'true'){
//...
}
else{
return wpautop(get_the_content());
}
In Anon Post
It works now, but i am not sure if it is the best option.