Update Event doesn't add object

Hello.

I hope to add custom object to specific event using PyMISP. I'm using PyMISP 2.4.168.
When i tried it, it didn't work.

I did something like below first.

test = self.misp.get_event(6, pythonify=True)
test.info = 'Object Testing '
object_test = MISPObject(name='custom-phishing', misp_objects_path_custom='files/misp-objects/objects/custom-phishing/definition.json')
object_test.add_attribute(object_relation='Category', simple_value='Hello', type='text')
test.add_object(object_test, standalone=True)
self.misp.update_event(test, pythonify=True)

The object template is correctly added to the MISP instance. Also I can add the object in the GUI but no with PYMISP

No error are given, just the event updates itself with no objects inside.

Kind regards

Start with the reported PyMISP sequence using get_event(), MISPObject.add_attribute(), add_object(), and update_event(), and reproduce it against the custom-phishing definition.json path shown. Trace the event update request and compare it with the GUI behavior; done means the custom object remains attached to the event after update_event() completes.