Asset.ready() event is called incorrectly when loading assets that are inside a container

[OlegGedzjuns]

When loading a mesh asset inside a glb container .ready() callback on the mesh asset is called immediately, not waiting for the container asset to be loaded.

https://playcanvas.com/project/1242313/overview/incorrect-ready-on-loading
launch, check the console for logs

1. subscribe to mesh asset ready
2. subscribe to container asset ready
3. start loading mesh asset
4. mesh ready callback is called immediately, .resource.meshes variable is null inside the mesh asset, but the asset is marked as loaded
5. container asset is loaded
6. container ready is called
7. mesh asset now has meshes

mesh asset ready() should be called only when an actual container is loaded

[willeastcott]

@slimbuck Is this something you're familiar with?

[slimbuck]

Can confirm render assets fire ready immediately instead of waiting for container ready, but don't see an immediate simple fix.