Total failure XC60

Hello dear forum, I have a Volvo XC60 four wheel and automatic, first registration 2013, mileage close to 415,000 Now to my problem: it was already twice the case that I went shopping, out of the store car can not lock up – does not react, so the small key is taken out of the pusher so I get the driver door open, all other doors can only be opened from the inside, trunk closed, not a single indicator lights, neither mileage, clock line t…after 1.5 hours, the car started normally as if nothing had been done…except that the time was gone…Battery isn’t 1. Only a year old, 2. he doesn’t even try to start. Of course right to the workshop (not Volvo) he sees everything, found nothing…. Did anyone ever find that? But of course, soon he will drive to the Volvo workshop again…