Attributes contain exception

When requesting machines.list() I am getting exceptions as attribute values.

For example `client.machines.list()[0].owner.email` is returned as `maas.client.errors.ObjectNotLoaded: cannot access attribute 'email' of object 'User'`

Not that it matters much, but the owner user has in fact an email value set.

There are many other attributes with the same behaviour.

I am using python 3.10 and latest maas stable (3.5.2)

Any idea what this could be related to?

Reproduce the report with Python 3.10 and MAAS 3.5.2, starting at client.machines.list()[0].owner.email and checking the related object-loading behavior. Trace why the User object's email attribute is unavailable despite being set; done means owner.email and the other affected attributes load without ObjectNotLoaded exceptions.

Written by the indexing model from the issue text.