Rotor in Constellation?

[7enderbender]

So here’s a long shot: my wife’s Constellation was in service via Tourneau last year. Comes with a two year warranty.
Last week it stopped. After winding it manually it ran just fine again. Until two days later and after sitting on her dresser over night.
My guess is something is wrong with the automatic drive train (pardon my lack of more precise terms without looking them up).

Obviously, I could go back to Tourneau - which will lead to more superficial disinterested “customer service” and another trip of the watch to New Jersey and weeks and if not months to come back. Maybe in better shape, maybe not.
I’m actually going to Switzerland for a week next month and I’m thinking stopping at a Omega Boutique to see if they can do a better job even if they’ll charge me. But likely not possible during just one week even though I know the customer service at that specific location is great.

Any ideas? What else could I be missing here?