This is a Kodi issue rather than an issue with the box & is easily fixed.
Anyone having issues with kodi closing either use SPMC instead (works just like kodi but is updated on a regular basis) or in Kodi go to
System > Video > Acceleration > turn off
Allow hardware acceleration - amcodec. Exit out of Kodi & start it again, play a few movies/video files stop the video then try navigating around kodi see if it crashes. If it does, do the same again & also disable "
turn off Allow hardware acceleration - MediaCodec".
SPMC will run without having to do any of the above & is updated on a regular basis & fixes bugs not usually fixed by kodi themselves
SPMC by koying