Sent mails showing in iCloud Mail Inbox, but only on Mac Mail
I have iCloud mail with a custom domain. I read/send mail on Mac, iPhone and iPad, and once/while on icloud.com - and everything usually syncs fine. But a couple of times a month, Mac Mail decides to show COPIES of my most recent 2-3 Sent emails (but no more) in my Mac Mail INBOX. Often the emails were sent a few days/week ago - but then all of a sudden a few just show up in Mac Mail Inbox. This am (12/4), an email sent on 11/29 just showed up in Inbox. It wasn't there yesterday.
No I did not BCC, and it is only the last 1-3 Sent emails, not the entire Sent folder. I've checked Mail Preferences and View/folder settings, and nothing I've changed fixes it. FYI, they also are not showing on iPhone/iPad/iCloud Inbox, only Mac Mail Inbox, so iCloud seems to be synching fine. So that tells me it's a Mail display bug? 2020 M1 Air, Ventura 13.0.1, Mail 16.0
MacBook Air 13″, 13.0