fix jacobian bug

pennylane/workflow/jacobian_products.py

@@ -403,6 +403,7 @@ def __init__(
     ):
         if gradient_kwargs is None:
             gradient_kwargs = {}
+
         if logger.isEnabledFor(logging.DEBUG):  # pragma: no cover
             logger.debug(
                 "DeviceDerivatives created with (%s, %s, %s)",
@@ -415,7 +416,7 @@ def __init__(
         self._execution_config = execution_config
         self._gradient_kwargs = gradient_kwargs
 
-        self._uses_new_device = not isinstance(device, qml.devices.LegacyDevice)
+        self._uses_new_device = isinstance(device, qml.devices.Device)
 
         # only really need to keep most recent entry, but keeping 10 around just in case
         self._results_cache = LRUCache(maxsize=10)
@@ -428,6 +429,7 @@ def _dev_execute_and_compute_derivatives(self, tapes: QuantumTapeBatch):
         Dispatches between the two different device interfaces.
         """
         numpy_tapes, _ = qml.transforms.convert_to_numpy_parameters(tapes)
+
         if self._uses_new_device:
             return self._device.execute_and_compute_derivatives(numpy_tapes, self._execution_config)
         return self._device.execute_and_gradients(numpy_tapes, **self._gradient_kwargs)