Was reported similarly in German XT board. We encountered sudden engine off when rolling along slowly and gearing up from 1 to 2. It happened while passing over the neutral position, I guess. I experienced it once or twice within 5000km. Everybody was absolutely sure there was no user fault and no engine stall. We suspect some mistaken sensor (clutch/neutral?) switching off power. Engines were warm, no cold start issues, no potholes, no offroad, no vibration and nothing else one could think off. Appears to happen at gears 1 and 2 only. So, this sounds quite normal to me