Attempting to place an item in a minecart with chest causes the game to crash. After reloading the game, certain actions made prior to interacting with the chest are reversed, such as breaking a block or placing an item like a cauldron. Also, maps in frames will become invisible. Breaking the frame drops the frame plus the map like normal.
Thank you for your report! This issue was, however, reported at an earlier time as MCPE-12497. Feel free to add any information you find relevant in the comment section there.
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