Sometimes Twitter hides or blocks certain tweets in published threads.
They appear like this:
This is not Typefully’s fault: there's no distinction on Twitter between tweets published with Typefully or with official Twitter clients, and this has been confirmed to us by Twitter support.
Twitter flags some accounts or tweets based on keywords, links, images, or hashtags, and this makes some tweets look "unavailable".
This problem usually goes away on its own after a few hours, and Twitter support has confirmed to us that this problem is not related to Typefully in any way.