Describe the bug

When passing down SSR flag to transformRequest, it returns incorrect map sources (should be relative, like when you don't pass ssr flag) if the file has .js extension and didn't have a map before. I wasn't able to reproduce the issue any other way.

Reproduction

https://stackblitz.com/edit/node-tb5tp5?file=folder%2Ftest.js,index.js

Steps to reproduce

Run node index.js

System Info

Stackblitz

Used Package Manager

npm

Logs

No response

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