If a shopper says their saved items keep disappearing, the cause is almost always browser storage or a script conflict. Guest wishlists live in the browser, while logged-in shoppers’ wishlists sync to your account in Wishlist.
Browser storage blocked?
For guests, wishlist data is kept in the browser. If the browser blocks storage, nothing saves.
To check, open the browser’s developer tools (F12), go to Application > Local Storage, and look for wishlist entries. If it’s empty, storage is being blocked.
To unblock:
Open browser privacy settings
Turn off “Block all cookies” if it’s on
Add your store to the allowed sites list
Pause any privacy extensions temporarily
In private or incognito mode, wishlists work during the session but clear when the window closes. That’s how those modes are supposed to work.
Guest vs logged-in shoppers
Guest — Data lives in the browser, sticks around until the browser is cleared, and merges into the account wishlist the moment the shopper logs in.
Logged-in — Data syncs to your account in Wishlist, so it’s available from any device and survives a browser wipe.
If a logged-in shopper’s items aren’t saving, confirm they’re actually logged in, log out and back in, and check their customer account is in good standing in Shopify.
Another app conflicting?
Other storefront apps can interfere with the wishlist. To find the culprit, turn off your other storefront apps one at a time and test the wishlist after each one.
Common offenders:
Cookie consent banners (block storage)
Analytics tools (throw JavaScript errors)
Page speed optimizers (break the script)
Cart drawers (clash on selectors)
Reach out to us with the conflicting app’s name and we can ship a compatibility fix.
Network problems
Open the browser developer tools (F12), switch to the Network tab, click the wishlist button, and watch for failed requests (red rows).
CORS errors — Contact us, we’ll check your domain config
Timeout errors — Check the shopper’s internet connection
403 errors — App permissions may need refreshing — try reinstalling
500 errors — Temporary server issue, try again
Still stuck?
Try a different browser
Clear all browser data for your storefront
Reinstall the Wishlist app
Reach out to support with details