I recall this happening 2 or 3 times when I had my 2013 R3T. It was early on in my ownership and I don't remember how many miles I had on my bike when it happened. It can be a little freaky when it suddenly dies and not something you want to have to deal with. I remember thinking "what the heck just happened...did I kill it", but I hit the starter and it took off again. I will say, as many have said, the problem resolved itself after I got more miles on the bike and it never happened again after that.
So far so good on my new 2015 and I just did the 500 mile service myself. I also put the PowerTripp tune on shortly after I got the bike home, reset the adaptic and did the 12 minute tune. We have had some nice temperatures here in Michigan making for a cool weather break in. The bike is running great "knock on wood" with no sudden dying episodes. Hopefully, it won't happen with this newer bike, but if holds true to form....it will go away as I get more miles on the bike. That seems to be the best fix. Maybe the ECU has some kind of a learning curve with a few hiccups thrown in for good measure. My 2 cents.