On an older kindle fire, the breaking animation is hidden. You can not see it unless you start mining before the game is done loading the textures.
Steps to reproduce, open a survival world on mcpe on a Kindle fire(the one I used was at least 4 years old), try to mine anything and you will see that you can't see the breaking animation. You also can not see the highlight on the block when your finger is on it. How ever if you are fast enough and try to mine before the world is visible you can see the breaking animation.
Thank you for your report! This issue was, however, reported at an earlier time as MCPE-7831. Feel free to add any information you find relevant in the comment section there.
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