Cool. Thanks for taking time to dig in. I wasn't able to post direclty to nostr.wine or filter.nostr.wine, though, when I tested a new note isolating for those relays. The previous notes were broadcast to other relays (and maybe also wine?)
Discussion
Another thing it could be is total event size. We probably have lower limits than some.
Can you look in your browser console when you try to publish and see if you see a response from our relay? It should say why we are rejecting it.