# Objective
Fixes#19219
## Solution
Instead of calling `world.commands().trigger` and
`world.commands().trigger_targets` whenever each scene is spawned, save
the `instance_id` and optional parent entity to perform all such calls
at the end. This prevents the potential flush of the world command queue
that can happen if `add_child` is called from causing the crash.
## Testing
- Did you test these changes? If so, how?
- Verified that I can no longer reproduce the bug with the instructions
at #19219.
- Ran `bevy_scene` tests
- Visually verified that the following examples still run as expected
`many_foxes`, `scene` . (should I test any more?)
- Are there any parts that need more testing?
- Pending to run `cargo test` at the root to test that all examples
still build; I will update the PR when that's done
- How can other people (reviewers) test your changes? Is there anything
specific they need to know?
- Run bevy as usual
- If relevant, what platforms did you test these changes on, and are
there any important ones you can't test?
- N/a (tested on Linux/wayland but it shouldn't be relevant)
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