Loads cannot be cancelled if the asset loader creates a labeled asset.

[andriyDev]

Bevy main, commit: ea8f22e

Normally, if you drop the handle when loading an asset, the load will be cancelled. This does not work if the asset loader creates a labeled asset however. In this case, the loader will "keep itself alive" since it is holding a handle to the subasset.

[andriyDev]

I don't think this is actually fixable given that we need to give users strong handles to their assets in the loader, and most users store those strong handles in their root assets (which should be done overall). We can slightly improve things by making it so the load context doesn't hold handles and instead holds asset IDs, so that at least if you drop the handles you're given in the loader, it won't keep the loader alive. It's not clear this matters though.