Hi Paulo, I think he might be referring to posts that are planned for a future date.
We are experiencing something similar as well. It works well when someone simple saves the posts and is immediately available. However, posts for future dates come out with empty content.
I am also having the same issue that that the autosaves are listed in the Instant Articles. In addition to that the articles are repeated in the list.
I mananged to get the images working using AMP by adding this line of code in the class-bjill-skip-post file. Add it right before the return in run_filter_check function.
if(function_exists('is_amp_endpoint')) {if( is_amp_endpoint()) $run_filter=false;}
This skips lazyload in amp pages and simply loads the normal images.
It is a temporary solution since the next update of the plugin will replace this.