Issue Description: I have a React app and sourcemaps are not working and when an error occurs I get a random message as function names are changed. I saw that if I go to developer tools and refresh, the sourcemaps are loaded correctly, but in production (and when I load the app for the first time) they are not working.
Can you reproduce it (exact steps to reproduce): Use a react app and load it.
Impact for my app: can’t debug user logs
Do you currently have a workaround? no