diff --git a/daemon/core/gui/coreclient.py b/daemon/core/gui/coreclient.py
index fa3b91a9..487cf03f 100644
--- a/daemon/core/gui/coreclient.py
+++ b/daemon/core/gui/coreclient.py
@@ -110,6 +110,8 @@ class CoreClient:
         self.xml_dir = None
         self.xml_file = None
 
+        self.modified_service_nodes = set()
+
     def reset(self):
         # helpers
         self.interfaces_manager.reset()
@@ -124,6 +126,7 @@ class CoreClient:
         self.emane_config = None
         self.service_configs.clear()
         self.file_configs.clear()
+        self.modified_service_nodes.clear()
         for mobility_player in self.mobility_players.values():
             mobility_player.handle_close()
         self.mobility_players.clear()
@@ -807,6 +810,9 @@ class CoreClient:
                 logging.error("unknown node: %s", node_id)
                 continue
             del self.canvas_nodes[node_id]
+
+            self.modified_service_nodes.discard(node_id)
+
             if node_id in self.mobility_configs:
                 del self.mobility_configs[node_id]
             if node_id in self.wlan_configs:
@@ -1047,3 +1053,6 @@ class CoreClient:
             config = self.emane_model_configs.get(_from)
             if config:
                 self.emane_model_configs[_to] = config
+
+    def service_been_modified(self, node_id: int) -> bool:
+        return node_id in self.modified_service_nodes
diff --git a/daemon/core/gui/dialogs/nodeservice.py b/daemon/core/gui/dialogs/nodeservice.py
index 0b4391ce..c61983f7 100644
--- a/daemon/core/gui/dialogs/nodeservice.py
+++ b/daemon/core/gui/dialogs/nodeservice.py
@@ -36,8 +36,14 @@ class NodeServiceDialog(Dialog):
             services = canvas_node.core_node.services
             model = canvas_node.core_node.model
             if len(services) == 0:
-                if not NodeUtils.is_custom(canvas_node.core_node.model):
+                # not custom node type and node's services haven't been modified before
+                if not NodeUtils.is_custom(
+                    canvas_node.core_node.model
+                ) and not self.app.core.service_been_modified(self.node_id):
                     services = set(self.app.core.default_services[model])
+                # services of default type nodes were modified to be empty
+                elif canvas_node.core_node.id in self.app.core.modified_service_nodes:
+                    services = set()
                 else:
                     services = set(
                         NodeUtils.get_custom_node_services(self.app.guiconfig, model)
@@ -141,12 +147,14 @@ class NodeServiceDialog(Dialog):
             )
 
     def click_save(self):
+        # if node is custom type or current services are not the default services then set core node services and add node to modified services node set
         if (
             self.canvas_node.core_node.model not in self.app.core.default_services
             or self.current_services
             != self.app.core.default_services[self.canvas_node.core_node.model]
         ):
             self.canvas_node.core_node.services[:] = self.current_services
+            self.app.core.modified_service_nodes.add(self.canvas_node.core_node.id)
         else:
             if len(self.canvas_node.core_node.services) > 0:
                 self.canvas_node.core_node.services[:] = []
diff --git a/daemon/core/gui/graph/graph.py b/daemon/core/gui/graph/graph.py
index e1f2232a..cbc7e89f 100644
--- a/daemon/core/gui/graph/graph.py
+++ b/daemon/core/gui/graph/graph.py
@@ -856,6 +856,11 @@ class CanvasGraph(tk.Canvas):
             node = CanvasNode(
                 self.master, scaled_x, scaled_y, copy, self.nodes[canvas_nid].image
             )
+
+            # add new node to modified_service_nodes set if that set contains the to_copy node
+            if self.app.core.service_been_modified(core_node.id):
+                self.app.core.modified_service_nodes.add(copy.id)
+
             copy_map[canvas_nid] = node.id
             self.core.canvas_nodes[copy.id] = node
             self.nodes[node.id] = node