This is affecting devices that run either the developer preview version of Windows Phone 8.1 or the carrier update version, so it does not seem to be build-specific. The good news is that Microsoft has since acknowledged that there is a problem and that they are looking to fix it, although no word on when that will be.
According to Kevin Lee, the Partner Director of Program Management at Microsoft, they have managed to identify the issue. “During the last two months we have been reaching out for more and more data and devices to systematically reproduce and narrow down the root cause. It turned out to be a power regulator logic failure where in combination with multiple reasons the device fails to power up the CPU and peripherals after idling into a deep sleep state.”
Lee also wrote, “I am pleased to pass on that we have a fix candidate under validation which we expect to push out the soon with the next SW update!” Like we said we have no idea when the next software update will be, but hopefully it will be soon. In the meantime any of our readers’ Lumia 925 or Lumia 1020 handsets affected by this bug?