Child Theme CSS changed after update

Hi there,

I’ve used the SiteOrigin North Theme and page builder to create a website: derekscott.ca. I created a child theme first so that future North Theme updates would not change the CSS in the stylesheet.

Unfortunately, I just updated the North Theme, and the update has altered the CSS of the child theme stylesheet.

What do I do about this, and how can I prevent this from happening in the future?

Thanks,
Alison