The products added to the bundle flow will include properties to identify the product to bundle and order when viewed in Cart or Checkout.
The “_bundlename”, or “_BundleID” properties seen here are referred to as “hidden” line item properties, since they start with an underscore. They are hidden during the Shopify checkout, and themes usually have the code built in to ensure that these are not displayed, but sometimes this needs to be added in manually.
To fix this, all we need to do is add a condition to the line item property loop in your cart.liquid template in your theme file.
Find
{% for p in item.properties %}
Past the code below directly beneath the line:
{% if p.first.first == "_" %}{% continue %}{% endif %}
If you are facing any troubles or have further customization requests