Welcome to the Shopify community. We appreciate you reaching out to share your question here.
When navigating to your website on a mobile device using (Google Chrome and Safari browser) I was unable to replicate the issue you’re experiencing. I was able to click into multiple products from your collections and navigate back to the previous page with no white blank screen.
I’d like to gather more information so that we can best identify this together. Could you provide more insight on the following:
Are customers able to replicate the issue? Have they reported this issue to you?
While browsing your store I noticed you haven’t had a chance yet to set up an FAQ page. Did you know that creating an FAQ page can help answer customers burning questions, improve your SEO and site navigation and earn trust from your customers? If you’re not sure where to start, we’ve got some great examples listed on our Shopify blog.