This has been working for us...not a permanent fix but at least some of us willing to share phone #'s get to play...
We came up w/ a workaround tho...1 person sets up game..other players go to Join A Game...select same game type, course, holes, tiers, etc. 1st player then search for "anyone" or "best match". Players will show up there...may have to delete a few others who come on searching for a game tho lol. We txt to pre-arrange the course.
may also work if you invite and cancel 2-4 times..