about 4 weeks ago, my group chat with several people reported not seeing my messages. After some investigating I determined the issue to be that people who used TMobile service all of a sudden stopped receiving my messages in the group chat. I can send them individual messages when RCS is on but they dont get my individual messages when RCS is off and it sends via SMS. I have had multiple calls to no avail and now have a service ticket however I need this solved ASAP or Verizon will be losing a 5 year customer. Please someone in networking reach out. I need to have reliable messaging services and its now been a month of this.