Inconsistent implementation of array slice

[luyaor]

How to reproduce:

        String json = "[\"a\", \"b\", \"c\", \"d\", \"e\"]"; // i.e., the json is ["a", "b", "c", "d", "e"]
        Object res = JsonPath.read(json, "$[0:3:2]");
        System.out.println(res); // it prints ["a","b","c"], the expected value is ["a", "c"].

In https://goessner.net/articles/JsonPath/ , it shows JSONPath supports step in array slice operator:

"JSONPath allows the wildcard symbol * for member names and array indices. It borrows the descendant operator '..' from E4X and the array slice syntax proposal [start:end:step] from ECMASCRIPT 4."

So, it is either a bug, or an unimplemented feature.