Do let us know if the 4.4 kitkat upgrade solves/removes this annoying issue!
I've had this exact same problem. It occurs a couple of times per week. This could be coincidence, but for me the first thing that seems to crash is Swiftkey. After that, everything else I attempt to open crashes and eventually the UI will crash as well. A reboot is the only cure. I don't use wireless charging so that doesn't appear to be the culprit for me. I just installed Kitkat tonight. Hopefully that rectifies the issue.