Mutliple domains not working for the CookieBlockedIframeOnly

Problem/Motivation

When entering multiple domains in the settings form for the formatted, these are saved in the yaml format in a format domain1\r\ndomain2\rn...

When the formatted is being rendered, it only explodes on \n, leaving every domain in a format domain2\r, which will never match

Steps to reproduce

Create an iframe field and use the formatter
Add multiple domains to the formatter
Select only minimal cookies when loading the website
Test the different domains