diff --git a/src/libslic3r/Format/bbs_3mf.cpp b/src/libslic3r/Format/bbs_3mf.cpp
index 5f447f91a0..37616d138b 100644
--- a/src/libslic3r/Format/bbs_3mf.cpp
+++ b/src/libslic3r/Format/bbs_3mf.cpp
@@ -4095,6 +4095,7 @@ void PlateData::parse_filament_info(GCodeProcessorResult *result)
 
             ModelVolume* volume = nullptr;
             ModelVolume *shared_volume = nullptr;
+            BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(": line %1%, subobject_id %2%, shared_mesh_id %3%")%__LINE__ %sub_object->id %shared_mesh_id;
             if (shared_mesh_id != -1) {
                 std::map<int, ModelVolume*>::iterator iter = m_shared_meshes.find(shared_mesh_id);
                 if (iter != m_shared_meshes.end()) {
@@ -4102,6 +4103,14 @@ void PlateData::parse_filament_info(GCodeProcessorResult *result)
                     BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(": line %1%, found shared mesh, id %2%, mesh %3%")%__LINE__%shared_mesh_id%shared_volume;
                 }
             }
+            else {
+                //for some cases, object point to this shared mesh already loaded, treat that one as the root
+                std::map<int, ModelVolume*>::iterator iter = m_shared_meshes.find(sub_object->id);
+                if (iter != m_shared_meshes.end()) {
+                    shared_volume = iter->second;
+                    BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(": line %1%, already loaded copy-share mesh before, id %2%, mesh %3%")%__LINE__%sub_object->id%shared_volume;
+                }
+            }
 
             const size_t triangles_count = sub_object->geometry.triangles.size();
             if (triangles_count == 0) {