Maybe delete the group chat and when someone sends the next message try sending on the new thread that appears on your phone? Sometimes it's just the simple things that fix problems. Outside of that you might need to contact Google through the messages app so they can troubleshoot.
Probably a carrier issue. I was on Xfinity and had this problem. Switched to Google fi due to pricing and now my MMS send without any issue. I had this issue prior to the beta as well.
To help us investigate further, please submit an Error Report through the Samsung Members app immediately after reproducing the problem:
1. Open Samsung Members โ One UI Beta Program โ Beta Feedback. 2. Select Error reports and attach any relevant screenshots or screen recordings (if available). 3. Make sure โSend system log dataโ is enabled before submitting.
Important: For accurate log collection, please submit the report within 3 minutes of reproducing the issue and do not kill the task of the Samsung Members app until you receive notification that the error has been sent (about 5 minutes)
We apologize for any inconvenience and appreciate your support in helping us improve the Beta experience.
