iOS 7.1 Reduced Motion -> Task switcher lag/no animation?

Edit: here's a video to illustrate the issue

Updated my iPad 4 to iOS 7.1. I have always had parallax turned off (reduced motion). With 7.1, going to the task switcher results in a lag and no animation Eg. double press the home button, no response (where the animation should be), suddenly in task switcher screen. Re-enabling motion brings back the animation, but of course it turns on everything else, including parallax.

Any ideas? A reboot doesn't make a difference.

Update: I restored my iPad, and it's the same. Not cool Apple. Hopefully this will be fixed soon.