ORM will now alias the main table in a query to the model's singular object name. i.e. Prior to 3.2 ORM set the from table like so:
$this->_db_builder->from($this->_table_name);
As of 3.2 it is now aliased like so:
$this->_db_builder->from([$this->_table_name, $this->_object_name]);
If you have a model Model_Order then when building a query use the alias like so:
$model->where('order.id', '=', $id);