# Description

This PR fixes a bug in the observation space construction for
non-concatenated groups in `ManagerBasedRLEnv._configure_gym_env_spaces`
method. Previously, only the last term in each group was included in the
Dict, causing loss of observation information. Now, all terms are
correctly added to the group Dict.

Fixes #3133 

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## Type of change

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- Bug fix (non-breaking change which fixes an issue)


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