I'm having issues using Imessage with OS 18. Android user are not receiving text message from a new group created with OS18. I added new users to a chat that we have been using for over a year. After upgrading to OS18 I was hoping I could add additional members without creating a new group, that apparently is not able to happen. What is happening, some folks with Android phones are not getting the text messages. These are members that have been on the group for sometime. Not sure if its all or some because I do not know who has what phone but it is indeed frustrating. I have tried turning off and on RCS and rebooting when I make the changes. I was under the impression OS18 would solve some of the incompatibility issues.