diff --git a/comfy_api/latest/_io.py b/comfy_api/latest/_io.py
index 1386cab5f..4969d3506 100644
--- a/comfy_api/latest/_io.py
+++ b/comfy_api/latest/_io.py
@@ -1030,8 +1030,8 @@ class Autogrow(ComfyTypeI):
         # account for the edge case that all inputs are optional and no values are received
         if not new_dict_added_to:
             finalized_prefix = finalize_prefix(curr_prefix)
-            out_dict["dynamic_paths"][finalized_prefix] = None
-            out_dict["dynamic_paths_empty_dict"][finalized_prefix] = finalized_prefix
+            out_dict["dynamic_paths"][finalized_prefix] = finalized_prefix
+            out_dict["dynamic_paths_default_value"][finalized_prefix] = DynamicPathsDefaultValue.EMPTY_DICT
         parse_class_inputs(out_dict, live_inputs, new_dict, curr_prefix)
 
 @comfytype(io_type="COMFY_DYNAMICCOMBO_V3")
@@ -1169,6 +1169,8 @@ class V3Data(TypedDict):
     'Dictionary where the keys are the hidden input ids and the values are the values of the hidden inputs.'
     dynamic_paths: dict[str, Any]
     'Dictionary where the keys are the input ids and the values dictate how to turn the inputs into a nested dictionary.'
+    dynamic_paths_default_value: dict[str, Any]
+    'Dictionary where the keys are the input ids and the values are a string from DynamicPathsDefaultValue for the inputs if value is None.'
     create_dynamic_tuple: bool
     'When True, the value of the dynamic input will be in the format (value, path_key).'
 
@@ -1522,7 +1524,7 @@ def get_finalized_class_inputs(d: dict[str, Any], live_inputs: dict[str, Any], i
         "required": {},
         "optional": {},
         "dynamic_paths": {},
-        "dynamic_paths_empty_dict": {},
+        "dynamic_paths_default_value": {},
     }
     d = d.copy()
     # ignore hidden for parsing
@@ -1535,9 +1537,9 @@ def get_finalized_class_inputs(d: dict[str, Any], live_inputs: dict[str, Any], i
     if dynamic_paths is not None and len(dynamic_paths) > 0:
         v3_data["dynamic_paths"] = dynamic_paths
     # this list is used for autogrow, in the case all inputs are optional and no values are passed
-    dynamic_paths_empty_dict = out_dict.pop("dynamic_paths_empty_dict", None)
-    if dynamic_paths_empty_dict is not None and len(dynamic_paths_empty_dict) > 0:
-        v3_data["dynamic_paths_empty_dict"] = dynamic_paths_empty_dict
+    dynamic_paths_default_value = out_dict.pop("dynamic_paths_default_value", None)
+    if dynamic_paths_default_value is not None and len(dynamic_paths_default_value) > 0:
+        v3_data["dynamic_paths_default_value"] = dynamic_paths_default_value
     return out_dict, hidden, v3_data
 
 def parse_class_inputs(out_dict: dict[str, Any], live_inputs: dict[str, Any], curr_dict: dict[str, Any], curr_prefix: list[str] | None=None) -> None:
@@ -1574,14 +1576,15 @@ def add_to_dict_v1(i: Input, d: dict):
 def add_to_dict_v3(io: Input | Output, d: dict):
     d[io.id] = (io.get_io_type(), io.as_dict())
 
+class DynamicPathsDefaultValue:
+    EMPTY_DICT = "empty_dict"
+
 def build_nested_inputs(values: dict[str, Any], v3_data: V3Data):
     paths = v3_data.get("dynamic_paths", None)
-    empty_dict = v3_data.get("dynamic_paths_empty_dict", None)
-    if paths is None and empty_dict is None:
+    default_value_dict = v3_data.get("dynamic_paths_default_value", {})
+    if paths is None:
         return values
     values = values.copy()
-    if empty_dict is not None and len(empty_dict) > 0:
-        ...
 
     result = {}
 
@@ -1596,6 +1599,11 @@ def build_nested_inputs(values: dict[str, Any], v3_data: V3Data):
 
             if is_last:
                 value = values.pop(key, None)
+                if value is None:
+                    # see if a default value was provided for this key
+                    default_option = default_value_dict.get(key, None)
+                    if default_option == DynamicPathsDefaultValue.EMPTY_DICT:
+                        value = {}
                 if create_tuple:
                     value = (value, key)
                 current[p] = value
diff --git a/comfy_extras/nodes_logic.py b/comfy_extras/nodes_logic.py
index eb888316a..ac9d643ec 100644
--- a/comfy_extras/nodes_logic.py
+++ b/comfy_extras/nodes_logic.py
@@ -186,7 +186,7 @@ class AutogrowNamesTestNode(io.ComfyNode):
 class AutogrowPrefixTestNode(io.ComfyNode):
     @classmethod
     def define_schema(cls):
-        template = _io.Autogrow.TemplatePrefix(input=io.Float.Input("float"), prefix="float", min=1, max=10)
+        template = _io.Autogrow.TemplatePrefix(input=io.Float.Input("float", optional=True), prefix="float", min=1, max=10)
         return io.Schema(
             node_id="AutogrowPrefixTestNode",
             display_name="AutogrowPrefixTest",
@@ -257,9 +257,9 @@ class LogicExtension(ComfyExtension):
             CustomComboNode,
             # SoftSwitchNode,
             # ConvertStringToComboNode,
-            # DCTestNode,
+            DCTestNode,
             # AutogrowNamesTestNode,
-            # AutogrowPrefixTestNode,
+            AutogrowPrefixTestNode,
             # ComboOutputTestNode,
             # InvertBooleanNode,
         ]