I just checked the windows version. It doesn't work there either. The console comes up and goes away correctly... but no commands work inside it.
For Mojave or later screen recording is built in. shift-command-5 pulls it up. Be aware this is exactly the behavior I'm seeing on Windows 10. On this Mac I'm running the Catalina 10.15 developer beta... but that doesn't seem to matter since the behavior is identical on the windows version. Here's a link to the screen capture. Let me know if you want me to try any other commands or run any code to introspect the environment.
You might need to add puts to the front of the message to have it display in console. So, instead of typing:
Good call. That worked. Thanks. I honestly thought I'd tried that. That is a useful workaround until it's fixed. Interestingly enough... "puts help" prints out "Type $gtk.help into the console."... which is a very python response.