In the Column Aggregator node, if you aggregate on a set of columns (by Concatenate) and using “\n” as the delimiter, in the output the values are separated by \n rather than a new line.
This is in contrast to the GroupBy node, whereby when you use “\n”, the output values appear on a newline.
I would say the GroupBy node is expected behaviour, and if you really want to see \n in the output then the text in the delimiter box should be \n
Simon.