We have fixed this issue here by the following simple steps:
1 .The friend in which group you were (or eventually anyone else) must just start a new group and invite you.
2. If you are in the new group, select the “Leave Group” command on the Group icon menu.
After I did leave the group, everything seems to work again as it should. So in the future, until this is fixed, the group leader should not leave the group, until all invited members have left it. This way it seems to work fine. We just played together this evening and followed this rule and everything is still fine.
I hope this will work for you guys also. Good luck.