use lstm: True doesn't work with a custom model on a Dict observation space

use lstm: True doesn't work with a custom model on a Dict observation space: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). I'm training on a custom env whose observation space is a gym.spaces.Dict (a few named sub-fields). I have a custom model registered via…