OK, does the original note still show up locally for you in your cache?  If so, in Iris could you select broadcast event on that note.  I believe this should resend it to your relays.  Once done could you screenshot the note and reply here with the pic so that we can see if there are any keywords that might be triggering spam filters?

Do you currently have an unreliable internet and/ or vpn connection that could be briefly failing while you're posting sometimes? If not, your relay list appears to be small so there may be some value to adding some additional large relays such as: wss://relay.damus.io and/ or wss://nostr-pub.wellorder.net