Combine CSS file includes WPML language in CSS url

I have a CSS with following code

.my-class { background-image: url(/wp-content/image.jpg); }

which loads image from root wp-content/ folder. If I enable combine CSS, for some reason url is updated to include also domain. So it becomes

.my-class { background-image: url(//my-domain.com/wp-content/image.jpg); }

which works fine if I create a cache on root page (without language). But if I create a cache (so first page access) on another language (for example de), it gets generated as

.my-class { background-image: url(//my-domain.com/de/wp-content/image.jpg); }

which is incorrect. It this a bug in a plugin or must I enable something?

• This topic was modified 5 years, 1 month ago by freakman.