Amiko Alien Broken

have been using Amiko Alien for some time now. It has always worked flawlessly on the Spark image.
For some time now, it is giving me a lot of trouble. It randomly reboots for no good reason. I tried to flash it with a back dated Spark firmware, but the problem still exists.
I also flashed it with Enigma 2 image. In case of this image, the problem occurs when I am “tuning” new channels. The moment I press the channel search button, the system crashes and reboots. Interestingly this can also happen within the Spark Enviornment i.e. system can crash while channel changing.
Does this imply a problem with the bootloader or it is a hardware problem?
Can you please help?