Publishing a website is not updating my CSS bundles

Question

When I run my code from Visual Studio in release mode, and check the bundled style sheet, I can see my updates to the css files in that bundle. However when I publish the we

Answer 1

In my case bootstrap.min.css also exists in content folder which I removed it and web site working fine.

as per Filip Stanek mentioned "the optimizer will first attempt to use the "bootstrap.min.css" file during publish"

even if we didnt add it in bundle config while publishing code it point to "bootstrap.min.css"