SSF Couch COOP is bugged! Cannot play together.

Tell me a good reason that I cannot play coop with MY ssf characters together.

My daughter and I are quite disappointed.

We are hoping that this is just an oversight/bug, and that once we gain your attention on the matter we can have this resolved.

You know what SSF means, or? Solo self found: no party, no trading!

Sure.

But did you know that in SSF you can find a new piece of gear, currency, atlas progression, league progression, etc and you can SHARE all of that with as many other of your own SSF characters you choose.

So my question is:
"If my characters already share everything on SSF, why cant they play together in SSF?"