Bundle Builder was designed to integrate into the theme's Cart Page primarily.
The Cart Page template is more or less standardised across all Shopify themes, so the app's coding can easily and immediately integrate into this as needed.
If the Shopify theme has a Cart Drawer option, however, this is highly personalised and uses a coding setup specific to the theme in question, in complete contrast to the Cart Page's more universal nature.
This unique and customised nature creates coding differences, making Cart Drawers unsuitable for all third party plug-ins and integrations, as Shopify itself notes for their supported integrations:
For more information on the intensive Integration process, you can find our Advanced guide below:
When a customer creates a bundle and proceeds to order it, they should be redirected to your Cart Page by the app by default, even if the theme is set to use the Cart Drawer by standard If any issues occur with the appearance of the Cart drawer after installing Bundle Builder, please contact your theme developers if further assistance is needed.