After changing from 2.0.1 to 2.1.0, join("") no longer works in my json files:

Code:
        "lyrics": [
            "沒有說過 第一個是你<br />", 
            "不鬆手都給身走 有誰能說我未夠<br />"
        ].join("")
I must remove .join("") for it to work but then it will show in the comma in every sentence.

Any ideas? Thanks