On XO tablets, MCPE appears to continue to register a touch-and-holdafter removing one's finger from the screen. The position of the event remains static until attempting to touch again.

Steps to reproduce:
Touch+hold to destroy blocks, then remove finger from screen.
Repeat several times.

After several attempts, the 'block destruction' circle will remain in place and continue to destroy blocks even after the screen is no longer being touched. Further, returning touching the screen in a new location will be treated as "dragging" to that location. This can easily cause undesirable block destruction.

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This is the most obvious example but this appears to cause issues with player movement as well.