Past few days i've restarted my phone, shut down and startup, power + home but this issue persists. My multitasking cards show up when i double tap home. if i try to switch apps it works. But if i try to swipe away a card up or down it kind of just goes half way up, gets stuck, and restarts my phone where I see the apple logo. Haven't seen any reports on this. I updated to beta 1 rom 6.1.3 on my 4s. I'm sure a set up as new will fix this. But just reporting this as i havent seen anybody else talk about this.