Hi,
Ok, I see the issue on the shop page now. This page is clearly using old code from the old version of the plugin which would imply that the page is still cached.
Here is a video comparing the code on both pages so you can see how they are different: https://a.cl.ly/rRuBxYmq
You mentioned you cleared wprocket cache, is it possible your site has multiple caching sources? Perhaps you are also using a CDN like CloudFlare that needs to be cleared?
I also see you are using Avada and this theme has a critical CSS option which perhaps is enabled and causing the issue?
Honestly, themes shouldn’t have this sort of option built-in. It’s plugin territory. Because you are using WP Rocket for your site optimizations and your theme also has some of these built-in it creates unnecessary bloat and potential conflicts.
Themes really should leave this functionality out and not bloat up their product with plugin functionality. It creates more harm then good (imo). Luckily, it looks like Avada does have options to disable those features, which I would recommend disabling if you do have them enabled since you are using WP Rocket. Even if it’s not causing the issues you are seeing with your shop page caching, I wanted to give you a heads up in case you do have the Avada CSS/JS optimizations enabled which creates unnecessary work for your site and could cause conflicts.