RenderMode=Auto, first request - how to set cookie?

[artyom-p]

Hi, I'm using the new Blazor template with global Auto-render mode. When the user first time visits the site, the response is rendered on the backend, I need to store user preferences in a cookie (language, etc) on change, but I can't create a cookie as an exception is thrown saying that the response already started, I assume that's because its SignalR call. After dotnet wasm runtime is loaded there are no issues, but the first request is an issue.

Is there any other way to set a cookie on a first request?