Hi, did you solve this problem? I also encountered this problem. The data in a table is separated by multiple commas, so BAS cannot determine the correct separation position.
Select "Mix Lines" in the resource, that way all the lines are mixed and thus it will have a random line. Or you can use javascript to mix the array list using function shuffle to get a better constant randomization. I believe there's also the option "Shuffle List" under the "List" option