Hi,
i have the same issue, i found a workaround
you need to store the path of the meshComponent and on each loop you reload the object
it’s append when i want to update an meshcomponent inside a BluePrint
always when i use set_editor_property all the list is TRASHED 
first i loop to save all data
def getSelectedActorData(self):
acorList = []
listActors = self.UUtils.list_selected_actor()
for item in listActors:
# list of actorData
# ActorData contain all information to assign the material
# Label of Actor
# Path = Level path include Blueprint
# type = static or skeletal mesh
# mesh = mesh or Skeletal
#
actorData = {}
asset_class = item.get_class()
#class_name = self.system_lib.get_class_display_name(asset_class)
actor_label = item.get_actor_label()
actorPath = self.getPathActor(item)
actorData['label'] = actor_label
actorData['name'] = item.get_name()
actorData['path'] = actorPath
if (self.isBluprintActor(item)):
# print('------------------BLUE PRINT----------------')
listComp = item.get_components_by_class(unreal.MeshComponent)
for SM_Actor in listComp:
if SM_Actor == None:
continue
typeOk = False
asset_class_bp = SM_Actor.get_class()
class_name_bp = self.system_lib.get_class_display_name(asset_class_bp)
if class_name_bp == 'SkeletalMeshComponent':
# print('---------------------- Skeletal BP--------------')
typeOk = True
actorData['type'] = 'SkeletalMeshComponent'
actorData['mesh'] = SM_Actor.get_editor_property("skeletal_mesh")
# print(SM_Actor.get_parent_components())
if class_name_bp == 'StaticMeshComponent':
# print('---------------------- Static mesh BP --------------')
typeOk = True
actorData['type'] = 'StaticMeshComponent'
actorData['mesh'] = SM_Actor.get_editor_property("static_mesh")
# print(SM_Actor.get_materials())
# print(SM_Actor.get_attach_parent())
# We saveData blue print
if typeOk:
if actorData['mesh'] == None:
continue
fileNameImport = actorData['mesh'].get_editor_property("asset_import_data").get_first_filename()
fileNameImport = unreal.Paths.get_base_filename(fileNameImport)
actorData['fileNameImport'] = fileNameImport
actorData['meshComponent'] = SM_Actor
actorData['meshComponentPath'] = SM_Actor.get_path_name()
actorData['label'] = SM_Actor.get_name()
actorData['name'] = SM_Actor.get_name()
actorData['name'] = actorData['name'].replace('[','')
actorData['name'] = actorData['name'].replace(']','')
actorData['name'] = actorData['name'].replace(':','')
actorData['path'] = unreal.Paths.combine([actorPath, self.getPathBluePrintAsset(SM_Actor)])
actorData['nameAsset'] = actorData['mesh'].get_name()
actorData['pathAsset'] = actorData['mesh'].get_path_name()
# print(actorData['label'])
# print(actorData['path'])
acorList.append(actorData.copy())
else:
SM_Actor = item.get_component_by_class(unreal.MeshComponent)
if SM_Actor == None:
continue
typeOk = False
asset_class_bp = SM_Actor.get_class()
class_name_bp = self.system_lib.get_class_display_name(asset_class_bp)
if class_name_bp == 'SkeletalMeshComponent':
# print('---------------------- Skeletal --------------')
typeOk = True
actorData['type'] = 'SkeletalMeshComponent'
actorData['mesh'] = SM_Actor.get_editor_property("skeletal_mesh")
# print(SM_Actor.get_parent_components())
if class_name_bp == 'StaticMeshComponent':
# print('---------------------- Static mesh --------------')
typeOk = True
actorData['type'] = 'StaticMeshComponent'
actorData['mesh'] = SM_Actor.get_editor_property("static_mesh")
# print(SM_Actor.get_materials())
# print(SM_Actor.get_attach_parent())
# We saveData blue print
if typeOk:
if actorData['mesh'] == None:
continue
fileNameImport = actorData['mesh'].get_editor_property("asset_import_data").get_first_filename()
fileNameImport = unreal.Paths.get_base_filename(fileNameImport)
actorData['name'] = actorData['name'].replace('[', '')
actorData['name'] = actorData['name'].replace(']', '')
actorData['name'] = actorData['name'].replace(':', '')
actorData['meshComponent'] = SM_Actor
actorData['meshComponentPath'] = SM_Actor.get_path_name()
actorData['fileNameImport'] = fileNameImport
actorData['nameAsset'] = actorData['mesh'].get_name()
actorData['pathAsset'] = actorData['mesh'].get_path_name()
acorList.append(actorData.copy())
return acorList
after on my program i reload on each loop my actor
#TO AVOID TRASH component we reload the component on each loop
actor = unreal.AssetRegistryHelpers.get_asset_registry().get_asset_by_object_path(actorData['meshComponentPath']).get_asset()
to detect blueprint i found this maybe is a better way
def isBluprintActor(self,actor):
asset_class = actor.get_class().get_class()
class_name = self.system_lib.get_class_display_name(asset_class)
if class_name == 'BlueprintGeneratedClass':
return True
else:
return False
hope it’s help 