Since this looks like a region-specific bug, you're better off trying to contact Microsoft support in Korea directly.I'm Korean, therefore I can't speak english very well,,, please understand even if your can't understand me clearly
I updated 2013-10-04 version. By the way, after update, problem happened. In touchcover and volumeButten, and touch part(ex touchPen, finger touch) SO Result checking in device manager, yellow flag was registered in touchCover article. HID_sensor too.
this Bug are showing now several people in Korea, and Our community site is so small scale.... that result... now We are not catching way...
P.s My Surface Pro is not 8.1rtm
PP.s I want to get response about this reply to mail. firstname.lastname@example.org