I’m using GeneratePress with Beaver Themer to create my WooCommerce Single Product Page template.
If I build my layout and include the Themer WooCommerce Product Images Module it outputs a smaller thumbnail and not a large image for the Main product image.
If I switch themes to Storefront my layout works fine.
There appears to be an issue with GeneratePress and Themer with the WooCommerce Product Images Module specifically.
Resolved temporarily. It was a CSS issue. See below for the answer from Beaver:
It looks like the woocommerce.css is overriding the styling for our WooCommerce Product image styling when using GeneratePress. I’ve checked with Storefront/BB theme and this doesn’t happen. Therefore, I’ve gone ahead and reported this to our bug tracker for developer review. In the meantime, you should be able to add the CSS in the link below to resolve the issue until we fix the issue. 🙂