I noticed the issue when I try to join/start a Qwirkle game on my iPhone, I access the game center find my friends but I'm not able to invite them to start a game, the exact same thing is happening with my friend all this happened since I updated my iPhone to 15.4. With my old iPad with an older system, I'm able to initiate games without a problem I can send an invitation to an iPhone with the 15.4 system and initiate a game. I tried all the usual procedures to debug the problem (restart the iPhone, reinstall the Qwirkle app, log out/login game center...) to no avail. Does anyone know what is going on?