FunctionsController is creating two func process

Executing below code (on calling StartFunctionsInstance) is creating two func process, it should ideally create only one func process per function apps. please advise if this is expected behaviour?

// Create and start a functions instance
var controller = new FunctionsController(logger);
await controller.StartFunctionsInstanceAsync(
path: "MyFunctionApp", // Function project path
port: 7071, // Port to run on
runtime: "net8.0" // Runtime version
);