Logs are better than nothing, yeah.
FWIW, I can count on the finger on... okay, both hands ;p, the amount of actual kernel hangs I've seen on my Forma in over four years (or however long it's been released). And, if it is indeed a kernel issue, the koreader version is meaningless.
Also: those weren't excruciating details

: *how* do you open the folder shortcut list, *exactly*?
I'd recommend keeping an SSH terminal open either via Wi-Fi or USBNet and see if it's *actually* hung for real (and/or if it magically stops hanging that way, because that's not unheard of either (hi, Libra 2!)).