Early surrender doesn't need to be unanimous if the final vote is cast after 20 minutes

If you call a surrender vote before 20 minutes (e.g. at 19:45), but the final vote is cast after 20 minutes, then it doesn't need to be unanimous.

I'm not sure if this is intentional, but the text on the screen does suggest the vote would need to be unanimous. So if this is intentional behavior perhaps the clarity could be increased.