As far as I understand, using the

UserAgent

plugin in browsers can be a bit problematic. Usually the browser does not send the

User-Agent

header, when

Access-Control-Allow-Headers

does not allow it, but when using the plugin, ktor always sends it. Shouldn`t ktor behave the same using a preflight request? It should at least be documented. Am I right?

Hey @benkuly, yep it might be a problem. Could you log an issue for that?

Sure 🙂 https://youtrack.jetbrains.com/issue/KTOR-6458/User-Agent-plugin-in-browsers-with-CORS