I do hope you can replicate this fuel issue - I didn’t know about the (main) Wing Tank levels thing - so I’ll have to get in the air tomorrow and check that that wasn’t a component in my Failures today.
But certainly - an In-Air Refuel (al tanks to 100%) still left the APU and Left One Starved.
So we have an issue of some kind - we just need to define it properly - then we can start shooting Zen-Desk, VOTES - if needed, etc.