request.headers.get() returns string with commas instead of semicolons as delimiter on Windows

When using `request.headers.get("cookie")` on https I get a string that uses commas instead of semicolons as delimiters, even though the cookie in the Header in browser clearly has semicolons as delimiters.

Example: https://github.com/pellebjerkestrand/azure-functions-core-tools-https-cookie-commas

The expected behavior is for the delimiter to be the same as in the browser.