Frame skips in Jetpack Joyride?

I have been playing Jetpack Joyride for a while on my iPod, but suddenly one day it started freezing on frames. I have timed it, and it happens on every other second, the game will freeze for a beat and then continue on normally (only for to freeze again in two seconds). You can see how this would quickly get annoying.
I thought closing the app and re-opening it would work, and that this was just some small bug or lag. But it turns out that starting the game fresh with no other apps running in the background did not change anything. Neither did turning the iPod off and turning it back on again. It has been a full week now, and the problem still persists and I have not found any information online relating to it.
Has anyone else experienced this problem before and does anyone have a fix for it?
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I tried speedrunning Jetpack Joyride and experienced immense emotional pain
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