Always reproduced:

```
milovidov-desktop :) create table table_map (a Map(String, String), b String) engine = MergeTree() order by a;

CREATE TABLE table_map
(
    `a` Map(String, String),
    `b` String
)
ENGINE = MergeTree
ORDER BY a

Query id: 8f8120c1-c165-452a-815f-2bcae3957e2a

Ok.

0 rows in set. Elapsed: 0.002 sec. 

milovidov-desktop :) SELECT b FROM table_map WHERE a = map('name', NULL, '', NULL)

SELECT b
FROM table_map
WHERE a = {'name', NULL, '', NULL}
```
result_column = ConvertImpl<LeftDataType, RightDataType, NameCast>::execute(
                            arguments, result_type, input_rows_count, AccurateConvertStrategyAdditions());
                    }
                    else
                    {
                        result_column = ConvertImpl<LeftDataType, RightDataType, NameCast>::execute(
                            arguments, result_type, input_rows_count, AccurateOrNullConvertStrategyAdditions());
                    }
                    return true;
                }
                return false;
            });
            
            if (!res)
            {
                if (wrapper_cast_type == CastType::accurateOrNull)
                {
                    auto nullable_column_wrapper = FunctionCast::createToNullableColumnWrapper();
                    return nullable_column_wrapper(arguments, result_type, column_nullable, input_rows_count);
                }
                else
                {
                    throw Exception{"Conversion from " + std::string(getTypeName(from_type_index)) + " to " + to_type->getName() + " is not supported",
                        ErrorCodes::CANNOT_CONVERT_TYPE};
                }
            }
            return result_column;
        };
    }
    WrapperType createStringWrapper(const DataTypePtr & from_type) const