Bcc copies moved to trash after iOS 18.6.2 update on iPhone and iPad

I always Bcc myself on emails that I send from my mailbox. Since the last update, the Bcc copies are immediately moved from my inbox on my iPhone (iPhone 16 Pro, iOS 18.6.2) to my trash. I reviewed all my settings and they still show that ‘Bcc myself’ is checked.

This is also happening on my iPad (iPad Pro, 6th generation, 12.9”, iOS 18.6.2). Rechecked settings and they are all the same as prior to the update.

Please advise how I can resolve this problem. Thank you.

[Re-Titled by Moderator]

Original Title: Mail problem with Bcc