I have GP Premium on my website. I just noticed that the grid view in my woocommerce store doesn’t work. I haven’t made any changes to my GP settings lately. However, the hosting account was upgraded yesterday (but by backing up the site and copying it to another more powerful server. The process was done by the hosting company, and I don’t think the mess these things up.
Anyway, about the settings for Customize > Layout > Woocommerce > Product Columns is set to 3, but all products are showing in one column, even when viewing it full screen (2560 px wide).