Model instance overwritten after commit. about sqlalchemy-redshift HOT 2 OPEN

EXAMPLE 1 BEFORE:  None Example #1
Traceback (most recent call last):
  File "test.py", line 50, in <module>
    print("EXAMPLE 1 AFTER: ", example_1.id, example_1.name)
  File "/tmp/env/lib/python2.7/site-packages/sqlalchemy/orm/attributes.py", line 237, in __get__
    return self.impl.get(instance_state(instance), dict_)
  File "/tmp/env/lib/python2.7/site-packages/sqlalchemy/orm/attributes.py", line 579, in get
    value = state._load_expired(state, passive)
  File "/tmp/env/lib/python2.7/site-packages/sqlalchemy/orm/state.py", line 592, in _load_expired
    self.manager.deferred_scalar_loader(self, toload)
  File "/tmp/env/lib/python2.7/site-packages/sqlalchemy/orm/loading.py", line 703, in load_scalar_attributes
    raise orm_exc.ObjectDeletedError(state)
sqlalchemy.orm.exc.ObjectDeletedError: Instance '<IdentityExample at 0x7f0da95b68d0>' has been deleted, or its row is otherwise not present.

2017-06-01 09:08:29,163 INFO sqlalchemy.engine.base.Engine select version()
2017-06-01 09:08:29,163 INFO sqlalchemy.engine.base.Engine {}
2017-06-01 09:08:29,618 INFO sqlalchemy.engine.base.Engine select current_schema()
2017-06-01 09:08:29,618 INFO sqlalchemy.engine.base.Engine {}
2017-06-01 09:08:30,073 INFO sqlalchemy.engine.base.Engine SELECT CAST('test plain returns' AS VARCHAR(60)) AS anon_1
2017-06-01 09:08:30,073 INFO sqlalchemy.engine.base.Engine {}
2017-06-01 09:08:30,301 INFO sqlalchemy.engine.base.Engine SELECT CAST('test unicode returns' AS VARCHAR(60)) AS anon_1
2017-06-01 09:08:30,301 INFO sqlalchemy.engine.base.Engine {}
2017-06-01 09:08:30,982 INFO sqlalchemy.engine.base.Engine select relname from pg_class c join pg_namespace n on n.oid=c.relnamespace where pg_catalog.pg_table_is_visible(c.oid) and relname=%(name)s
2017-06-01 09:08:30,983 INFO sqlalchemy.engine.base.Engine {'name': u'identity_example'}
2017-06-01 09:08:31,445 INFO sqlalchemy.engine.base.Engine
DROP TABLE identity_example
2017-06-01 09:08:31,445 INFO sqlalchemy.engine.base.Engine {}
2017-06-01 09:08:31,920 INFO sqlalchemy.engine.base.Engine COMMIT
2017-06-01 09:08:32,152 INFO sqlalchemy.engine.base.Engine select relname from pg_class c join pg_namespace n on n.oid=c.relnamespace where pg_catalog.pg_table_is_visible(c.oid) and relname=%(name)s
2017-06-01 09:08:32,153 INFO sqlalchemy.engine.base.Engine {'name': u'identity_example'}
1 before None john
2017-06-01 09:08:32,850 INFO sqlalchemy.engine.base.Engine BEGIN (implicit)
2017-06-01 09:08:32,856 INFO sqlalchemy.engine.base.Engine INSERT INTO identity_example (name) VALUES (%(name)s)
2017-06-01 09:08:32,857 INFO sqlalchemy.engine.base.Engine {'name': 'Example #1'}
2017-06-01 09:08:33,331 INFO sqlalchemy.engine.base.Engine COMMIT
2017-06-01 09:08:33,695 INFO sqlalchemy.engine.base.Engine BEGIN (implicit)
2017-06-01 09:08:33,696 INFO sqlalchemy.engine.base.Engine SELECT identity_example.id AS identity_example_id, identity_example.name AS identity_example_name
FROM identity_example
WHERE identity_example.id = %(param_1)s
2017-06-01 09:08:33,696 INFO sqlalchemy.engine.base.Engine {'param_1': 0}
Traceback (most recent call last):
  File "test.py", line 50, in <module>
    print("EXAMPLE 1 AFTER: ", example_1.id, example_1.name)
  File "/tmp/env/lib/python2.7/site-packages/sqlalchemy/orm/attributes.py", line 237, in __get__
    return self.impl.get(instance_state(instance), dict_)
  File "/tmp/env/lib/python2.7/site-packages/sqlalchemy/orm/attributes.py", line 579, in get
    value = state._load_expired(state, passive)
  File "/tmp/env/lib/python2.7/site-packages/sqlalchemy/orm/state.py", line 592, in _load_expired
    self.manager.deferred_scalar_loader(self, toload)
  File "/tmp/env/lib/python2.7/site-packages/sqlalchemy/orm/loading.py", line 703, in load_scalar_attributes
    raise orm_exc.ObjectDeletedError(state)
sqlalchemy.orm.exc.ObjectDeletedError: Instance '<IdentityExample at 0x7f0da95b68d0>' has been deleted, or its row is otherwise not present.