Usually sourcemaps shouldn't contribute to bundle-size, unless they're inlined (which you're not doing with the hidden-source-map option). "no-reference" just means that there will be no link to the source map at the bottom of the JS files. I think in this situation you want to generate the sourcemaps, upload them to Sentry, and delete them afterwards. Unfortunately we don't have an example yet for this but if you figure it out feel free to contribute to our docs!