This is bizzare!
I have exactly the same problem, my Ipad mini crashes, all the time when using Mobile Pod, and Mobile Pod seems very unstable, and so I read one or two of the above posts, and tried my Sonic Port VX with other apps, well actually only Garage Band on it's own, without using inter-app and so far it seems to be very stable.
So the problem seems to lie with Mobile Pod, so c'mon Line 6, get it sorted!
Alan