The problem: If you don't fill out the "Meta Description" in Shopify for your pages / products, Shopify will add 'default' SEO information into that field. If you're using Shortcodes at the very top of your page with no content before it, Shopify will "guess" what content should go into your Meta Description, and may put Shortcodes in there. We don't want that, as it doesn't look good in SEO results. See screenshots below.
How to fix it: To combat this, simply fill out the "Meta Description" field within Shopify. Once this is done, Shopify will show your description information instead of any default-generated shortcodes.