If you hold on your screen while looking at a minecart you will first enter it (this is normal), but then your character starts punching blocks like crazy. It won't stop until you tap on the screen.
Phone: Samsung Galaxy S4 mini.
MCPE-11768
Minecart block destroying bug
Resolved
Works As Intended
0
(Unassigned)
Unconfirmed
Phone - Android - Samsung Other (Specify in description)
Android 4.4.2
0.13.0
Retrieved
This is a side effect of game mechanics we have implemented at the moment. It is possible this will be "fixed" in the future.