diff --git a/openpype/hosts/maya/api/lib.py b/openpype/hosts/maya/api/lib.py
index 4324d321dc..7e8bb5439f 100644
--- a/openpype/hosts/maya/api/lib.py
+++ b/openpype/hosts/maya/api/lib.py
@@ -4,7 +4,6 @@ import os
 import sys
 import platform
 import uuid
-import math
 import re
 
 import json
@@ -3562,3 +3561,43 @@ def get_color_management_output_transform():
     if preferences["output_transform_enabled"]:
         colorspace = preferences["output_transform"]
     return colorspace
+
+
+def get_all_children(nodes):
+    """Return all children of `nodes` including each instanced child.
+    Using maya.cmds.listRelatives(allDescendents=True) includes only the first
+    instance. As such, this function acts as an optimal replacement with a
+    focus on a fast query.
+
+    """
+
+    sel = OpenMaya.MSelectionList()
+    traversed = set()
+    iterator = OpenMaya.MItDag(OpenMaya.MItDag.kDepthFirst)
+    for node in nodes:
+
+        if node in traversed:
+            # Ignore if already processed as a child
+            # before
+            continue
+
+        sel.clear()
+        sel.add(node)
+        dag = sel.getDagPath(0)
+
+        iterator.reset(dag)
+        # ignore self
+        iterator.next()  # noqa: B305
+        while not iterator.isDone():
+
+            path = iterator.fullPathName()
+
+            if path in traversed:
+                iterator.prune()
+                iterator.next()  # noqa: B305
+                continue
+
+            traversed.add(path)
+            iterator.next()  # noqa: B305
+
+    return list(traversed)
diff --git a/openpype/hosts/maya/plugins/publish/collect_arnold_scene_source.py b/openpype/hosts/maya/plugins/publish/collect_arnold_scene_source.py
index 0415808b7a..fd4993d09e 100644
--- a/openpype/hosts/maya/plugins/publish/collect_arnold_scene_source.py
+++ b/openpype/hosts/maya/plugins/publish/collect_arnold_scene_source.py
@@ -1,6 +1,7 @@
 from maya import cmds
 
 import pyblish.api
+from openpype.hosts.maya.api.lib import get_all_children
 
 
 class CollectArnoldSceneSource(pyblish.api.InstancePlugin):
@@ -21,11 +22,13 @@ class CollectArnoldSceneSource(pyblish.api.InstancePlugin):
                 self.log.warning("Skipped empty instance: \"%s\" " % objset)
                 continue
             if objset.endswith("content_SET"):
-                instance.data["setMembers"] = cmds.ls(members, long=True)
-                self.log.debug("content members: {}".format(members))
+                set_members = get_all_children(cmds.ls(members, long=True))
+                instance.data["setMembers"] = set_members
+                self.log.debug("content members: {}".format(set_members))
             elif objset.endswith("proxy_SET"):
-                instance.data["proxy"] = cmds.ls(members, long=True)
-                self.log.debug("proxy members: {}".format(members))
+                set_members = get_all_children(cmds.ls(members, long=True))
+                instance.data["proxy"] = set_members
+                self.log.debug("proxy members: {}".format(set_members))
 
         # Use camera in object set if present else default to render globals
         # camera.
diff --git a/openpype/hosts/maya/plugins/publish/collect_instances.py b/openpype/hosts/maya/plugins/publish/collect_instances.py
index 6c6819f0a2..6bf0756323 100644
--- a/openpype/hosts/maya/plugins/publish/collect_instances.py
+++ b/openpype/hosts/maya/plugins/publish/collect_instances.py
@@ -1,48 +1,8 @@
 from maya import cmds
-import maya.api.OpenMaya as om
 
 import pyblish.api
 import json
-
-
-def get_all_children(nodes):
-    """Return all children of `nodes` including each instanced child.
-    Using maya.cmds.listRelatives(allDescendents=True) includes only the first
-    instance. As such, this function acts as an optimal replacement with a
-    focus on a fast query.
-
-    """
-
-    sel = om.MSelectionList()
-    traversed = set()
-    iterator = om.MItDag(om.MItDag.kDepthFirst)
-    for node in nodes:
-
-        if node in traversed:
-            # Ignore if already processed as a child
-            # before
-            continue
-
-        sel.clear()
-        sel.add(node)
-        dag = sel.getDagPath(0)
-
-        iterator.reset(dag)
-        # ignore self
-        iterator.next()  # noqa: B305
-        while not iterator.isDone():
-
-            path = iterator.fullPathName()
-
-            if path in traversed:
-                iterator.prune()
-                iterator.next()  # noqa: B305
-                continue
-
-            traversed.add(path)
-            iterator.next()  # noqa: B305
-
-    return list(traversed)
+from openpype.hosts.maya.api.lib import get_all_children
 
 
 class CollectInstances(pyblish.api.ContextPlugin):
diff --git a/openpype/hosts/maya/plugins/publish/validate_arnold_scene_source.py b/openpype/hosts/maya/plugins/publish/validate_arnold_scene_source.py
index 84240e63e6..e582560e12 100644
--- a/openpype/hosts/maya/plugins/publish/validate_arnold_scene_source.py
+++ b/openpype/hosts/maya/plugins/publish/validate_arnold_scene_source.py
@@ -36,9 +36,6 @@ class ValidateArnoldSceneSource(pyblish.api.InstancePlugin):
                 parents.append(parent)
 
             nodes_by_name[node_split[-1].split(":")[-1]] = node
-            for shape in cmds.listRelatives(node, shapes=True):
-                basename = shape.split("|")[-1].split(":")[-1]
-                nodes_by_name[basename] = node + "|" + shape
 
         return ungrouped_nodes, nodes_by_name, parents
 
diff --git a/openpype/hosts/maya/plugins/publish/validate_arnold_scene_source_cbid.py b/openpype/hosts/maya/plugins/publish/validate_arnold_scene_source_cbid.py
index 056cc94edf..5d0ef79838 100644
--- a/openpype/hosts/maya/plugins/publish/validate_arnold_scene_source_cbid.py
+++ b/openpype/hosts/maya/plugins/publish/validate_arnold_scene_source_cbid.py
@@ -24,9 +24,6 @@ class ValidateArnoldSceneSourceCbid(pyblish.api.InstancePlugin):
         for node in nodes:
             node_split = node.split("|")
             nodes_by_name[node_split[-1].split(":")[-1]] = node
-            for shape in cmds.listRelatives(node, shapes=True):
-                basename = shape.split("|")[-1].split(":")[-1]
-                nodes_by_name[basename] = node + "|" + shape
 
         return nodes_by_name