“Your session has expired” on replying

I have a question in the community. I posted it without issue. I have updated to IOS 14.6, and signed in to the community to reply to a reply.

My reply goes pink with “Your session has expired, please log in again”

Aside from the fact that my expired session only lasted about 1 minute, it makes no sense. I copied my post in the dialogue box, logged back in and pasted it into the reply. Hit “Reply” - same message.

Many, many times. Is this a known issue? I’ve checked the updated iPad and everything is in order (Apple ID account, etc are all unchanged).