# Description

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In function `isaaclab.envs.mdp.events.randomize_rigid_body_com`, the
random CoM values were sampled with respect to `env_ids`, but when added
to the bodies' current CoMs, `env_ids` is omitted, resulting in
potential shape mismatch error if `len(env_ids) <> env.scene.num_envs`.


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## Type of change

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applicable. -->

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

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

---------
Signed-off-by: Xinpeng Liu <43176336+Foruck@users.noreply.github.com>
Co-authored-by: ooctipus <zhengyuz@nvidia.com>