Please send the URL to your website so we can debug it.
This is Dallas from the Social Care Team here at Shopify.
I would love to see what I can do to help you out. In order to best understand what might be happening would you be able to share:
If you could also try the initial step of clearing your cache in your browser just to make sure that that isn't the reason that this is happening. In order to clear your cache, this link will help to walk you through all of the steps for each browser.
If the cache doesn't help with the issue please share the things I listed above and I would be happy to help you out further!
It appears that the img src is referencing the 50x50 variant of the images.
Try changing them to the following: