MMS Messages not sending or receiving on Group Texts

Yesterday I bought a Sumsung s20 Ultra from my Xfinity store and switched to Xfinity from Verizon.  All of my SMS messages are sending and receiving just fine.  I am having problems with my new phone sending and receiving MMS messages on group texts.  They aren't sending and I am not receiving any.  I am using the default texting app that came with the S20 Ultra and I have also tried Google messaging.  Both have the same problems.  I can send a picture with text with MMS to a single person, but I can't send a picture with text or just text to mutliple people.  So MMS sort of works but only when sending to one person.  But when I try to send ANYTHING to more than one person or receive a message from more than one person it doen't work.  The only workaround I have found is turing on airplane mode, turning wifi back on, then turning wifi calling on.  Then everything goes through without problem.  This CAN"T be the solution to get group texts.  Anyone know of a better solution?  Yes, I have updated my phone, re-started it, cleared cache etc.  

Thanks,

Brad