Annoying bug in 4.3

I'm on a Nexus 4 running stock unrooted 4.3.

Say I open an app from the homescreen, like settings. Then I press the multitask button and switch to another app in the multitask UI (recent apps), say Facebook. I haven’t opened Facebook in a long time, so presumably it is out of active memory. Now if I attempt to hit the back button, I'm thrown back into the multitask UI, instead of going to the homescreen. Now if I hit back again while being in the multitask UI, I'm thrown back to Facebook. This happens 3-4 times before I go back to the homescreen.

This is a pretty major bug (if everyone is experiencing it) that Google somehow missed in Android 4.3. Are any of you experiencing it?