The default behavior for link title unfurling (when the website doesn't allow Fellow access) is parsing and truncating names.

For example, both https://x.docs.shopify.io/ and https://z.docs.shopify.io/x/y/ render as "Shopify" for me. The page titles are different, but I imagine Fellow doesn't have access (which is ok). Just leave the link as is minus https://... instead.