Mine is using Alby, not my own node at the moment. I suspect the issue was Damus not connecting to relay.getalby.com - I wasn’t even seeing traffic going to this relay in my firewall logs. I’ve just set up the NWC zaps again and this time it is working correctly. Maybe a Damus or iPhone issue rather than Alby but I’ll keep sending zaps with NWC for a while and see if it breaks again.