/v2/transactions/async Not working

I’m trying to play with the new /v2/transactions/async experimental API. I’ve enabled experimental endpoints and created a simple pay transaction (1 algo from one of my wallets, to another one of my wallets). Grouped and serialized to bytes as expected. If I post it to /v2/transactions it works fine, if I try to post to async, it does not. If I enable debug logging, node.log indicates that it saw the transaction group but nothing else.

Am I correct in my understanding that this sends directly to the gossip network? Is there a reason why it would take the transaction, return a 200 status code, and still not forward the transaction onward?

Was wondering if anyone had any guidance on the topic.

Thanks!