How to break line in property value of web designer

Hey everyone,

We have migrated our platform from 8.0.1 to the latest version 8.1.4 in our UAT environment.

There are some modification on the web interface which are not accepted by the customer UAT.

One of our "issue" is about a break line which were present and working on 8.0.1 but seems not working anymore on 8.1.4 with the following property value :

I have tried many things like "<br/>", "\r\n", "Environment.NewLine" but nothing seems working.

How can we apply again this break line ?

8.1.4 render example:

8.0.1 render example:

Thank you.