Another update.
Problem with ESET addon is one thing but it don’t cossing my issue. I sent another encrypted email to myself from my friend mailbox and I noticed that when this email shows itself in Outlook main folder decryption works fine but when Outlook recive it and move it to folder using some rules decryptions fails and email is shown as blank with encrypted attachments like in picture I’ve sent before.
Mailbox is set as IMAP.