Here I solved. You can copy and paste this code by following the video tutorial;
Topic summary
Mobile-only issue: navigating back from any product page shows a white blank screen, while desktop works normally.
Shopify staff tested on mobile (Chrome and Safari) and could not reproduce. They asked for more details (customer reports, exact mobile browser), and suggested trying a fresh theme and clearing mobile cache/cookies.
A suggested fix: insert a small code snippet into theme.liquid (the theme’s main layout file) just above the tag. Exact code not shown here, but multiple users report it resolves the problem.
Outcome: The original poster confirmed the issue was fully fixed after adding the snippet. Several other store owners echoed that the same change solved their sites.
Additional resource: Another participant shared a video tutorial and code as an alternative guide (content not included here).
Status: Resolved for the OP and others via the theme.liquid code update; no outstanding questions noted. Code snippet/video are central to implementing the fix.