Cannot connect to servers directly through Steam's browser

Seems we cant connect to servers through the Steam’s server browser system, which would make things a lot easier while the in-game server browser is being worked on.
The system seems to almost be in place, as the servers already report to Steam, but the game doesn’t seem to be able to deal with the direct connect command I assume it gives.

It does however start up Tower Unite if it isn’t already on.

This also affects the steam browser protocol (aka steam://connect/IPHERE )
Figured I’d file this under a bug report as the system seems to be almost in place.

The only notes I can see about this in their roadmap is: “Might just be a difference with how traditional servers are joined vs. lobbies.”