NPE on S2293 when using parametrized types in lambda

import java.util.ArrayList;
import java.util.function.Function;

public enum SonarProblemCase {
    MY_BUCKET(rp -> { return new ArrayList<Integer>(); }), // crashes
    MY_BUCKET2(rp -> new ArrayList<Integer>() ); // works fine

    SonarProblemCase(Function<Object,Object> bucketer) {
    }
}