With the free GeneratePress version, my single product page looked normal – image to the left, title and price to the right, add to cart button under price. When I activated GP Premium with no other changes to plugins, etc, the single product page shows an image that takes up the entire space that used to be the image, title, price, button and related products area. The title and other words are only showing to the far right with one letter per line and runs all the way down the right side of the enormous image. When GP Premium is deactivated, the products show normally.
Here is how I discovered it was my paid version of GP Premium. First, I followed recommendations to change themes and found out that the product page looked normal so that made a difference. Ithen re-activated my free GeneratePress theme back. Next, I deactivated all plugins except Woocommerce. I had to add back in my ssl plugin next. Then, I activated the membership plugins and checked the product page. Still good. That is when I re-activated the GP Premium plugin and found it broke the product page. I deactivated and re-activated and yep, that weas the plugin that was breaking the page. All the other plugins were then re-activated one by one with no further breakage to the free version.