Automatic port forwarding not quite right with HTTPS

[mxswd]

The default asp.net config (I think) results in two open ports. One HTTP, the other HTTPS.

The HTTP one redirects to https://localhost:12345 so when you open the port proxy it redirects to localhost.

The HTTPS one seems to just hang and timeout, it seems the port proxy doesn't like self signed HTTPS certificates?

Either way... I'm just using curl in the vs code terminal, would be nice to use the codespace port proxy instead. Any ideas?