PLEASE NOTE THIS DID NOT OCCUR IN 0.8.0 BETA 2.

I own a Kindle Fire 2nd Gen with root (but no ROM flash; running stock OS 2.3.3) and MCPE legally purchased from Google Playstore, playing the 0.8.0 Beta 3, and very often when changing activities (Going from menus to game, or vice versa), or when walking casually, the game will start to run very choppy and after a few seconds, freeze up and my Kindle will get stuck on the black "Kindle Fire" loading screen, forcing me to force reset the entire device.