Hi,
In fact I reverted to default Write.as ActivityPub ID/Adresse (@aris@aris.papatheodorou.net) for testing purpose, because my custom one (@blognotes@aris.papatheodorou.net) was not working at all.
In clear : I’m not following anymore my blog with @blognotes@aris.papatheodorou.net but with @aris@aris.papatheodorou.net
Doing this, my last post was correctly found by Mastodon, with the preview image… I am waiting now for next post to see if it federate…
I also follow my blog from @aris@write.as. This grabbed the two preview posts… but not the new one.
I will try in next days from an other Mastdon instance.
Really this is a ghost in the machine 