Sorry, had to bump this. This is my biggest complaint NOW. It never occurred for me until after Patch 3. Hopefully this gets rectified ASAP. For those unaware, if you try playing with friends from MyCourt and join ProAm Walk-On, only the MyCourt leader gets into the ProAm Walk-on game, while your remaining friends are stuck at 99% loading.
We would normally just play ProAm Team Up, but sometimes there are only a couple of us. ProAm is a lot more fun to us than MyPark so we'd really like to avoid playing Park if possible some nights.
We did find a minor work around. It's the same trick you use to join games in EA's NHL. You both go to your individual MyCourts, and give a 1,2,3, go! and join ProAm Walk-On. The drawback, is you very well could be on opposite teams. This has happened to us a few times.