My understanding is the Type Cover 1 and 2 are just USB connections to the keyboard. For mine, it was constantly rebooting and I pinned it down to when I flip the type cover back behind the tablet. That is when the random reboots happen. If I leave the keyboard out normal or disconnect it when just wanting to use it as a tablet it has not rebooted once. About 4 months worth of time without a single reboot as long as I follow that method. Never flip it back behind the tablet - disconnect if needed. Use the keyboard normally and no reboots. Obviously this should be fixed. However, I'm pretty sure the problem is related to the USB driver or hardware when it is turning on or off the keyboard.
That's exactly what I see in the trace as well using BlueScreenView.
Any software type at Microsoft could see the error if they invested a few minutes into the issue.