Nested calls not working, result not interpreted

[jbruchanov]

val script = """
            + simple1
            - <call>test "<bot VAR1>"</call>

            + complex
            - {@ something <call>test "<bot VAR1>"</call>}

            + interpret
            - {@ build <call>test interpret</call>}

            + setvar *
            - <bot VAR1=<star>>Var updated

            + getvar
            - Var1 is '<bot VAR1>'

            + something *
            - SomethingRef=<star>

            + build *
            - <bot VAR1=<star>>

            > object test javascript
            return "Test:" + args[0]
            < object

            > object interpret javascript
            return "<bot VAR1=interpret>"
            < object
            """.trimIndent()

        val user = "user"
        val re = RiveScript(Config.newBuilder()
                .strict(true)
                .utf8(true)
                .build()).apply {
            stream(script)
            sortReplies()
            setSubroutine("test", { re, args -> "Test:" + args[0] })
            setSubroutine("interpret", { re, args -> "<bot VAR1=interpret>" })
        }

        assertEquals("Var updated", re.reply(user, "setvar 123"))
        assertEquals("Var1 is '123'", re.reply(user, "getvar"))
        assertEquals("Test:123", re.reply(user, "simple1"))
        assertEquals("SomethingRef=Test:123", re.reply(user, "complex"))//failing, is '{__call__test "123"</call>}'
        assertEquals("", re.reply(user, "interpret"))//failing, is 'test interpret</call>}'
        assertEquals("Var1 is 'Test:interpret'", re.reply(user, "getvar"))//failing

javascript result (from https://www.rivescript.com/try)

User: setvar 123
Bot: Var updated
User: getvar
Bot: Var1 is '123'
User: simple1
Bot: Test:123
User: complex
Bot: SomethingRef=Test:123
User: interpret
Bot:
User: getvar
Bot: Var1 is 'Test:interpret'