Default EE kestrel problems.

Hi all I've owned my kestrel for a little over 2 weeks. I have noticed a problem with my handset however, it seems if I record a video in 720p with the flash on sometimes the video fails to save and other times it saves the video but if I lock the screen and then try to unlock 10 seconds later nothing happens sometimes the soft keys light up but the screen does not power on. I have to hold the power button to force the device to reset before it is functional again.

I'm wondering if any other kestrel owners have noticed this and if there is a fix? (Would prefer to not have to restore factory settings)

Thanks