Image (and font) paths are not found in <usa-banner> component

[thescientist13]

Acknowledging this is all in alpha still, I was just curious if I was missing something as I was playing around with these components and not being able to load some of the linked images within the components, like the expand images in the <usa-banner> component.

For example, loading the component and its inlined styles work fine, but not the expand images

Looking at the bundled output, there are relative references to these image assets (as well as fonts)
https://app.unpkg.com/@uswds/web-components@0.0.1-alpha/files/dist/components/usa-banner.js#L303

.usa-banner__header-action:after{background-image:url(../img/usa-icons/expand_more.svg);b

However, based on the source code, these look to be coming from the @uswds/uswds package?
https://app.unpkg.com/@uswds/web-components@0.0.1-alpha/files/src/components/usa-banner/usa-banner.scss.js#L6

I guess the bundling process is inlining those references as paths instead of leaving them as bare specifiers? Bare specifiers should work since @uswds/uswds defines an exports map for all these, at least as far as I can tell
https://app.unpkg.com/@uswds/uswds@3.13.0/files/package.json#L35

Minimal reproduction repo if you are interested - https://github.com/thescientist13/greenwood-uswds