Chained observers don't work when with OnRemove when entity is despawned

## Bevy version

0.16.1

## What you did

```rust
fn on_remove(on_remove: Trigger, mut commands: Commands) {
commands.entity(on_remove.target()).trigger(OtherObserver);
}
```

## What went wrong

I was expecting the second observer to be run, but it panics with

```
The entity with ID was despawned by /home/.../.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/bevy_ecs-0.16.1/src/spawn.rs:62:1
```