bog5 issue

So I've run into a problem with my wife's phone which is not rooted. Ever since she took the bog5 OTA if her battery is at 50% or less it reboots repeatedly until the battery dies, almost like a boot loop but it goes to the lock screen every time and if you are fast you can interact with it. It also occasionally randomly reboots once or twice between 80 and 50%.
kies wont do anything, vzw repair tool wont either and odin wasn't much help either, also vzw said since it has insurance I could pay for an insurance replacement. Any ideas are appreciated.. thanks