How do you know the FA wasn't PM/DM and next on UG list? Maybe didn't wanna bother moving their bags to the front? Maybe they just had been on a long haul, perhaps death in the family and needed a little extra comfort?

I'm selfish and want my crew members well rested, nourished and ready to take care of me. Don't care if I miss an UG every once in a while to that end. I'm sure there's a very good reason and I try to remember "complimentary" doesn't mean "guaranteed".