Hi, I recently update gym and mujoco_py and versions of those are Gym: 0.9.5 mujoco_py: 1.50.1.41 I know that several errors are ongoing for the latest version of mujoco_py. One of the errors is that I tested with `InvertedPendulum-v2`, but the mismatching attributes. Model from previous version and sim from the latest version are not matched. In the inverted_pendulum.py from the gym/envs/mujoco, the last line is still with the model attribute which is that MjViewer does not have. Is this still ongoing process or am I wrong with figuring it out?