Reproduce Steps

• run yarn build

• use Source Map Visualization to analyze source-map

Find a.json is mapped to use-sync-external-store incorrectly.

Workaround

• modify node_modules/terser-webpack-plugin/dist/index.js and comment follow line:

• run yarn build

• use Source Map Visualization to analyze source-map

Find a.json is no-source, this is expected.