Version Used: 16.3 Preview 2

Steps to Reproduce:

static class Extensions {
  public static string AsString(this object? data) => data?.ToString() ?? "";
}

class Example {
  void Method(object? value) {
    value.AsString(); // ← Hover over AsString
  }
}

1. Use the above code
2. Hover over the call to AsString

Expected Behavior:

(extension) string object?.AsString()

Actual Behavior:

(extension) string object.AsString()