Was this ever solved? I’m also having the same issue. The custom bundle title and image as specified in the Shopify Function appears in checkout but not in cart. The cart only shows the parent bundle product’s default title and image.
Based on @ioio 's example, the title “Super Bundle” should be overriding the default title of the parent product. In my liquid code I tried line_item.title, line_item.product.title, and line_item.variant.title. None of them are displaying “Super Bundle”. They all just work as if the product were a regular non-bundle product.
What is the correct liquid code to display the custom bundle title and image?? @Liam