# Description

To support creation of managers before the simulation starts playing (as
needed by the event manager for USD randomizations), the MR in #2040
added a callback to resolve scene entities at runtime. However, certain
class-based manager terms can also not be initialized if the simulation
is not playing. Those terms may often rely on parameters that are only
available once simulation plays (for instance, joint position limits).

This MR moves the initializations of class-based manager terms to the
callback too.

Fixes #2136

## Type of change

- 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`
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] 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

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Co-authored-by: Kelly Guo <kellyg@nvidia.com>