Emails sent via IOS Share feature sometimes disappear.
Two devices, iPhone 11 and iPad Pro 12.1, both updated to version 16.7.1, have sporadic problem with emails. Both devices use IMAP on my end and it’s been an issue across the past several security updates. When the Share feature is used within a native Apple app to send the recipient a link, document or other attachment via Mail, the email is not sent and completely disappears with no trace in Sent or any other folders on either device or anywhere on my IMAP server. It has also occurred with a simple Reply in Mail.
It’s not a case of closing out the Mail app prematurely and restarts and forced restarts of the devices have not helped. The Undo feature in Mail is set to 10 seconds and I keep a maximum of three apps open at best on the iPad at one time, only a max of two apps open on the iPhone. Is it possibly a problem with IOS or the Mail app? Thanks for any insight you might offer.
iPad mini 3, iOS 12