Pinggy SSH tunnels

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I am new to Rio and currently use iTerm2 on a MAC running Sequoia 15.1.1

To test services during development I sometimes require a domain and use a service called Pinggy from https://pinggy.io/

In its most basic its a simple ssh command

ssh -p 443 -R0:localhost:3001 a.pinggy.io

This will then creates a tunnel that points back to my machine for the service running on port 3001.
I Iterm I get the follwoing and all is running as expected

In rio I get the following as it returns back to the prompt.

Allocated port 9 for remote forward to localhost:3000
Error: Recovered
Connection to a.pinggy.io closed by remote host.
Connection to a.pinggy.io closed.