I'm seeing uncaught promise rejections in `loadImage`? It's hard to know exactly where it's actually coming from, those _should_ be caught?
My guess is that it's coming from canceled images, which are throwing errors even after loading? I don't totally understand how, because looking back, I don't think the `cancel` method was actually called???
Anyway, I fixed it so cancel actually _is_ called, and that we don't throw errors when the canceled image _correctly_ fails to load.
This should be more robust either way, but hopefully it also stops the flow of errors?