Unable to catch mail body even with 'mail.headers("PlainText")'

Hello, friends. I’m having a problem with reading the mail from GET IMAP MAIL MESSAGE.

The problem is that my mail body text comes empty when it’s comes from the automatically fowarding mail, but if i foward the exactally same mail manually, studio read it right.

I’m using 'mail.Headers(“PlainText”) to read the mail body.
The mail looks like this: