diff --git a/src/openforms/formio/serializers.py b/src/openforms/formio/serializers.py
index dea899300c..68350ebc0d 100644
--- a/src/openforms/formio/serializers.py
+++ b/src/openforms/formio/serializers.py
@@ -41,13 +41,13 @@ def apply_hidden_state(
         Hidden fields in Formio don't run *any* validation, see the
         ``Component.shouldSkipValidation`` method for reference.
         """
-        config_wrapper = FormioConfigurationWrapper(configuration)
-
         # initial_data is only set if Serializer(data=...) was used, and we can't take
         # (dynamic) hidden state into account without initial data.
         if not hasattr(self, "initial_data"):
             return
 
+        config_wrapper = FormioConfigurationWrapper(configuration)
+
         # can't use FormioData yet because of is_visible_in_frontend
         values: DataMapping = self.initial_data
 
diff --git a/src/openforms/formio/tests/validation/test_editgrid.py b/src/openforms/formio/tests/validation/test_editgrid.py
index ab4bbef10c..c9affb68ed 100644
--- a/src/openforms/formio/tests/validation/test_editgrid.py
+++ b/src/openforms/formio/tests/validation/test_editgrid.py
@@ -219,3 +219,81 @@ def test_required_but_empty_editgrid(self):
         )
 
         self.assertTrue(is_valid)
+
+    @tag("dh-667")
+    def test_regression_dh_ooievaarspas(self):
+        # Some fields inside the repeating group apparently get/got hoisted to the
+        # root serializer.
+        components = [
+            {
+                "type": "content",
+                "key": "werkgeverInfo",
+                "label": "werkgeverInfo",
+                "html": "<p>Als u een werkgever heeft krijgt u loon. Dit noemen we ook wel inkomen. U bent dan in loondienst.</p>",
+            },
+            {
+                "type": "radio",
+                "key": "heeftUEenWerkgever",
+                "label": "Heeft u een werkgever?",
+                "validate": {"required": True},
+                "openForms": {"dataSrc": "manual"},
+                "values": [
+                    {"label": "Ja", "value": "ja"},
+                    {"label": "Nee", "value": "nee"},
+                ],
+            },
+            {
+                "type": "fieldset",
+                "key": "loondienstWerkgevers",
+                "label": "Loondienst/werkgever(s)",
+                "conditional": {"eq": "ja", "show": True, "when": "heeftUEenWerkgever"},
+                "components": [
+                    {
+                        "type": "editgrid",
+                        "key": "werkgevers",
+                        "label": "Werkgever(s)",
+                        "groupLabel": "Werkgever",
+                        "validate": {"maxLength": 4},
+                        "components": [
+                            {
+                                "type": "textfield",
+                                "key": "naamWerkgever",
+                                "label": "Naam werkgever",
+                                "validate": {"required": True},
+                            },
+                            {
+                                "type": "currency",
+                                "key": "nettoLoon",
+                                "label": "Hoeveel nettoloon krijgt u ?",
+                                "currency": "EUR",
+                                "validate": {"required": True},
+                            },
+                            {
+                                "type": "radio",
+                                "key": "periodeNettoLoon",
+                                "label": "Over welke periode ontvangt u dit loon?",
+                                "validate": {"required": True},
+                                "openForms": {"dataSrc": "manual"},
+                                "values": [
+                                    {"label": "Per week", "value": "week"},
+                                    {"label": "Per 4 weken", "value": "vierWeken"},
+                                    {"label": "Per maand", "value": "maand"},
+                                ],
+                            },
+                        ],
+                    }
+                ],
+            },
+        ]
+        data = {
+            "heeftUEenWerkgever": "ja",
+            "werkgevers": [
+                {"naamWerkgever": "ABC", "nettoLoon": 5, "periodeNettoLoon": "maand"}
+            ],
+        }
+        context = {"submission": SubmissionFactory.build()}
+        serializer = build_serializer(components=components, data=data, context=context)
+
+        is_valid = serializer.is_valid()
+
+        self.assertTrue(is_valid)
diff --git a/src/openforms/formio/utils.py b/src/openforms/formio/utils.py
index fa0726523e..2f729a5b06 100644
--- a/src/openforms/formio/utils.py
+++ b/src/openforms/formio/utils.py
@@ -36,7 +36,10 @@ def iter_components(
         assert not components, "Both nested components and columns found"
         for column in configuration["columns"]:
             yield from iter_components(
-                configuration=column, recursive=recursive, _is_root=False
+                configuration=column,
+                recursive=recursive,
+                _is_root=False,
+                recurse_into_editgrid=recurse_into_editgrid,
             )
 
     for component in components:
@@ -52,7 +55,10 @@ def iter_components(
             if component.get("type") == "editgrid" and not recurse_into_editgrid:
                 continue
             yield from iter_components(
-                configuration=component, recursive=recursive, _is_root=False
+                configuration=component,
+                recursive=recursive,
+                _is_root=False,
+                recurse_into_editgrid=recurse_into_editgrid,
             )