Real or not ? Datejust 126331 everose gold chocolate

[Avanbeek]

I bought this everose gold datejust from a jeweller that is also verified on Wristler. After wearing it for 7/8 hours it stopped when I woke up. It seemed to have been laying in the store for some time so it probably have been dead there for some time. I started sleeping at 21:00/22:00 and now it is 07:40 it lost around 9 minutes of time on the watch. I was wondering if the watch looks good on the outside if not why not and what the possible problems could be maybe a service maybe a fake movement ?