Publish socket does not recognize new subscribers after first message is published

[agising]

The issue is further described at stack overflow, here: [https://stackoverflow.com/questions/66063569/swiftyzeromq-publisher-does-not-recognise-subscriber-after-first-message-is-publ]

If anyone could prove me wrong or point me in a direction to a solution I'd be very grateful!

EDIT: New subscribers are picked up every time i rebind the publisher socket: pubSocket.bind(endPoint). (-> Throwing an error that the address is already in use, but there seems to be no harm).
I also figured that it all works as intended when I run the code on the xcode iPhone simulator. Wonder if could be the different architectures or somehow connected to Apples Multicast Networking Entitlement.