Environment Variables not logging properly

I am curious about the sections in main.XXX.chunk.js such as

    S = Object({
      NODE_ENV: 'production',
      PUBLIC_URL: '',
      WDS_SOCKET_HOST: void 0,
      WDS_SOCKET_PATH: void 0,
      WDS_SOCKET_PORT: void 0,
      FAST_REFRESH: !0
    }).REACT_APP_API_BASE_URL;

and

    ft = Object(gt.a) (Object({
      NODE_ENV: 'production',
      PUBLIC_URL: '',
      WDS_SOCKET_HOST: void 0,
      WDS_SOCKET_PATH: void 0,
      WDS_SOCKET_PORT: void 0,
      FAST_REFRESH: !0
    }).REACT_APP_STRIPE_PUBLISHABLE_KEY),

and the source code that has created these.

Perhaps this issue, or this thread might hold some insights (or even this issue.)