chunked_values should return _value_type not plain string

octodns/record/chunked.py

@@ -18,7 +18,7 @@ class _ChunkedValuesMixin(ValuesMixin):
             for i in range(0, len(value), self.CHUNK_SIZE)
         ]
         vs = '" "'.join(vs)
-        return f'"{vs}"'
+        return self._value_type(f'"{vs}"')
 
     @property
     def chunked_values(self):