I have noticed that the for each email in mailbox does not seem to see emails where the subject line is left blank. They are left unread by the loop.
I have left the "When Subject Contains (optional)" field empty.
I would expect this to handle empty subject lines as well.
I also tried putting a wildcard (*) in the subject line filter. this reads the * as a string and ignores all that do not have an asterisk in the subject. I'm fine with this.
Any fixes or workarounds known?