Make Method Async renames wrong method if a method with the same name already exists

Version Used: VS 16.7.2

Steps to Reproduce: Create the following Methods

        static int Foo()
        {
            return 42;
        }

        static int Foo()
        {
            await Task.Delay(42);
            return 1;
        }

Place the cursor on the await and select Make method async refactoring Expected Behavior:

        static int Foo()
        {
            return 42;
        }

        static async Task<int> FooAsync()
        {
            await Task.Delay(42);
            return 1;
        }

Actual Behavior:

        static int FooAsync()
        {
            return 42;
        }

        static async Task<int> Foo()
        {
            await Task.Delay(42);
            return 1;
        }