A .mobi file produced by kindlegen contains both an old-style Mobipocket format supported by older kindle devices and a KF8 format with more advanced formatting options supported by newer devices.
According to the
Mobipocket Reader documentation the "height" attribute is not allowed for table rows. Looking at the files you provided it appears that kindlegen has correctly stripped this out, but the calibre conversion has left it in.
The Kindle Previewer renders the height, making the calibre conversion look more like you desire. But an actual Kindle device may not perform the same way when given this incorrectly formatted MOBI file from calibre.