diff --git a/client/ayon_core/tools/publisher/widgets/list_view_widgets.py b/client/ayon_core/tools/publisher/widgets/list_view_widgets.py
index 8d9f509b0e..969bec11e5 100644
--- a/client/ayon_core/tools/publisher/widgets/list_view_widgets.py
+++ b/client/ayon_core/tools/publisher/widgets/list_view_widgets.py
@@ -152,6 +152,8 @@ class InstanceListItemWidget(QtWidgets.QWidget):
 
         self._has_valid_context = None
 
+        self._checkbox_enabled = not instance.is_mandatory
+
         self._set_valid_property(context_info.is_valid)
 
     def mouseDoubleClickEvent(self, event):
@@ -185,6 +187,10 @@ class InstanceListItemWidget(QtWidgets.QWidget):
             self._active_checkbox.setChecked(new_value)
             self._active_checkbox.blockSignals(False)
 
+    def is_checkbox_enabled(self) -> bool:
+        """Checkbox can be changed by user."""
+        return self._checkbox_enabled
+
     def update_instance(self, instance, context_info):
         """Update instance object."""
         # Check product name
@@ -206,6 +212,7 @@ class InstanceListItemWidget(QtWidgets.QWidget):
         self._active_checkbox.setEnabled(enabled)
 
     def _set_is_mandatory(self, is_mandatory: bool) -> None:
+        self._checkbox_enabled = not is_mandatory
         self._active_checkbox.setVisible(not is_mandatory)
 
 
@@ -954,11 +961,17 @@ class InstanceListView(AbstractInstanceView):
             return
 
         active_by_id = {}
+        all_changed = True
         for row in range(group_item.rowCount()):
             item = group_item.child(row)
             instance_id = item.data(INSTANCE_ID_ROLE)
-            if instance_id is not None:
+            widget = self._widgets_by_id.get(instance_id)
+            if widget is None:
+                continue
+            if widget.is_checkbox_enabled():
                 active_by_id[instance_id] = active
+            else:
+                all_changed = False
 
         self._controller.set_instances_active_state(active_by_id)
 
@@ -968,6 +981,10 @@ class InstanceListView(AbstractInstanceView):
         if not self._instance_view.isExpanded(proxy_index):
             self._instance_view.expand(proxy_index)
 
+        if not all_changed:
+            # If not all instances were changed, update group checkstate
+            self._update_group_checkstate(group_name)
+
     def has_items(self):
         if self._convertor_group_widget is not None:
             return True