diff --git a/simpeg_drivers/components/factories/entity_factory.py b/simpeg_drivers/components/factories/entity_factory.py
index 6ad64801..f87abd39 100644
--- a/simpeg_drivers/components/factories/entity_factory.py
+++ b/simpeg_drivers/components/factories/entity_factory.py
@@ -109,7 +109,8 @@ def _build(self, inversion_data: InversionData):
             cells = self.params.data_object.transmitters.cells
 
             if getattr(self.params.data_object, "tx_id_property", None) is not None:
-                self.params.data_object.tx_id_property.copy(parent=entity)
+                tx_id = self.params.data_object.tx_id_property.copy(parent=entity)
+                entity.tx_id_property = tx_id
 
             if isinstance(
                 self.params.data_object.transmitters,
@@ -119,13 +120,25 @@ def _build(self, inversion_data: InversionData):
                     self.params.data_object.transmitters
                 )
 
-            entity.transmitters = self.params.data_object.transmitters.copy(
+            transmitters = self.params.data_object.transmitters.copy(
                 copy_complement=False,
                 vertices=vertices,
                 cells=cells,
                 parent=self.params.out_group,
+                copy_children=False,
             )
 
+            if (
+                getattr(self.params.data_object.transmitters, "tx_id_property", None)
+                is not None
+            ):
+                tx_id = self.params.data_object.transmitters.tx_id_property.copy(
+                    parent=transmitters
+                )
+                transmitters.tx_id_property = tx_id
+
+            entity.transmitters = transmitters
+
             tx_freq = self.params.data_object.transmitters.get_data("Tx frequency")
             if tx_freq:
                 tx_freq[0].copy(parent=entity.transmitters)
diff --git a/tests/run_tests/driver_ground_tem_test.py b/tests/run_tests/driver_ground_tem_test.py
index 0374ead8..354465e0 100644
--- a/tests/run_tests/driver_ground_tem_test.py
+++ b/tests/run_tests/driver_ground_tem_test.py
@@ -130,6 +130,7 @@ def test_ground_tem_fwr_run(
     fwr_driver = TimeDomainElectromagneticsDriver(params)
 
     survey.transmitters.remove_cells([15])
+    survey.tx_id_property.name = "tx_id"
     assert fwr_driver.inversion_data.survey.source_list[0].n_segments == 16
 
     if pytest:
@@ -232,6 +233,7 @@ def test_ground_tem_run(tmp_path: Path, max_iterations=1, pytest=True):
         output = get_inversion_output(
             driver.params.geoh5.h5file, driver.params.out_group.uid
         )
+        assert driver.inversion_data.entity.tx_id_property.name == "tx_id"
         output["data"] = orig_dBzdt
         if pytest:
             check_target(output, target_run, tolerance=0.5)