Ahhh the
WWW... I wondered when...
Actually this thread was merged from another thread, probably quite rightly as it was Ez related on a similar subject.
And I am not a professional pilot, but can quite happily justify my knowledge, although I agree it is tempered with a lack of any experience as such.
The fact is I know what I saw. Two Crew fiddling about with the CDUs unsure about arrival procedure operation. Two heads down was enough warning for me.