John, I believe this issue has been resolved but would like to share it with any other folks that have experienced an issue - this was related to a brief service impairment, but the issue has been resolved.
If you're still experiencing an issue, please connect with Tech Support directly to create a case.

John, yes we have many Users having this issue. All tied to Tmobile. RC Support is saying its a Tmobile issue.

I have been having issues as well and thought it was RingCentral, but it may be a TMobile compatibility issue since the group texts I send out seem to be okay for a Verizon user, but all those who are on TMobile are getting the texts as individual texts, so they have no idea who is in the original group I sent it to. They also cannot tell who responded. I always have to preface the text with - "Hi everyone..." so that they know it's going to a group.
I have been on the phone with tech once before that took nearly an hour for them to tell me it's a TMobile issue and its unusable for me so I tried to get out of my contract, but I didn't know it auto renews all lines every two years, so I'm stuck for another 18 months.
I am now on the phone with them for over 2 hours as we work through the call quality issues and now texting issues.

I’m having the same issue with T-Mobile. I have three different recipients, and all are not able to receive my messages. They can send it to me without issue.  

Hi ​@danvandusen,

To help us investigate this issue further, please submit a support ticket using the following link: https://support.ringcentral.com/new-case.html.

Thank you!

Thank you. I have submitted a ticket.