Why Don't Emails Stay "Read" In Mail?
I have a MacBook Air (13-inch, 2017) running Big Sur Version 11.2.2 with Mail Version 14.0 (3654.60.0.2.21).
On every other email client I've ever used, an email is marked as "read" if I click on it in my Inbox without having to double-click the email and open it. When I do the same thing in Mac Mail, a significant number of emails revert to being "unread" after a minute or so. There are some emails that I have to click on two or three times before Mac Mail accepts them as "read" and stops marking them as "unread". I don't understand this behavior. No other email client does this. I like to have a clean Inbox but this behavior makes it more difficult to determine how many new emails I've actually received.
MacBook Air 13″, macOS 11.2