Tag loose newline characters when copy from Xls

[RobbeR]

I would like to create tags on onPaste event (from xlsx). On "before-adding-tag", the tag text loose the newline characters, so I cannot split the string to multiple tags.
Is there any configuration option to avoid this behaviour?

EDIT: I tried "separators" config as well, like this: :separators="['\n', '\r\n']", without luck.