Email subject heading and from empty - Time Warner Internet

This question is about "Email subject heading and from empty", with Time Warner Cable internet and apps. Within the last week, I have begun receiving emails with no from and no subject heading. It is random and not tied to a particular email. Right now I have two in a recent download. If I click on them I can see that they are proper emails. I am using imap with mac mail on an imac.
There appear to be vendor changes with email. Assuming a bug in transition?

This topic covered Email subject heading and from empty, and TWC cable internet service.