Sync messages
There are two group chats and loads of individual chats I have in messages. I could see and respond on both my iphone and my macbook Air to all of them until yesterday. Suddenly, in one of the group chats, I can no longer respond on my macbook air. I can respond on my phone, but not my macbook. Every other chat, including the other group chat is fine, it's just this one that no longer works.
After spending an hour trying to trouble shoot, I'm now giving up. Beyond frustrating.
MacBook Air 13″, macOS 11.2