Device: Ipad,
Operating system: ?
Any possibility you were using Autopilot Plus? There have been many users having problems with fuel consumption with the A350-1000 specifically. I’m sure the devs are working on a fix that will come soon.
I was flying the A359 from EGLL to YSSY and landed at WALL to refuel - I put loads of fuel in to be safe. My flight then apparently ran out of fuel too. Definitely a common problem.