Incorrect return type on "Refactor->Create Method" inside lambda

Using the following source code:

public class BugKiller {
	public static void kill(){
		Function<String, List<Integer>> logic;
		logic = item->doThingWithString(item, 5, true);
	}
}

Invoking "Create Method" on `doThingWithString` will create a method with the return type of "Function<String, List<Integer>>" instead of "List<Integer>"