iMessage group chat missing reply text box

Hello,

I have an iMessage group chat on my iPad that is missing the reply text bar. The same group chat on my iPhone still works normally. Any message I receive still comes through to both my iPad and iPhone. I just can’t respond from my iPad. If I try to it creates a new group chat.

I’ve tried turning iMessage off then on again on my iPad, this hasn’t restored the input bar. I don’t want to delete the group chat as I don’t want to lose previous messages and images.

I’ve turned my iPad off then on; it’s running the latest iOS18. This problem existed in iOS 17 also.

Any ideas would be appreciated.