Loading the iFrame adds extra newlines to the text

I host an etherpad server and use `etherpad.js` to put etherpad iframes into my website. Unfortunately, every time an iframe is loaded, the newlines (`\n`) get modified (generally, they increase in number). This doesn't happen if I just reload the pad on my server, so it seems to have something to do with the iframe, but I don't know what.

Do you have any idea about how this could be happening?