It is an interesting issue. Apparently, there is litigation in the fashion industry over prints because the fabric is one of the few things in fashion that can be protected by copyright. Urban Outfitters lost a case a number of years ago when it used print purchased from an art studio in a dress design without being aware that the art studio had sold the same or similar print to another company. You can see the similar prints both used in dresses here:
https://www.knobbe.com/news/2017/05/...t-infringement
There appear to be a number of companies that regularly sue for copyright violations and it has become a bit of a booming industry in LA. But sometimes the cases fail. As when Star Fabrics sued Zulilly for a design that court found to be nothing more than a “zig-zag” that was not an element subject to copyright.