A number of reports have popped up relating to a “blue screen of death” error when multitasking on the iPhone 5s. The topic has been discussed in Apple user forums, as the issue seems to stem from using iWork on the 5s. Forbes has a video of the malfunction in its report. We tested the 5s using iWork and got the same results. In one test, the phone wasn’t truly rebooted — Touch ID could still be used to log in after the glitch…