Buyer removes any of the product from bundle, but the discount still remains on the remaining product

Unfortunately, the Shopify Discount does not work in that manner, which is a significant limitation that many customers have been complaining about. 

If you review the details in the Discount code section, you'll find that it only applies to the total spending amount and does not require all products to be present in the cart. 

If you want, I can submit a request to our Dev team to explore preventing discount codes from being applied at checkout if any products in the bundle are missing. However, implementing a solution may require some time for research and implementation.

Should you need any further assistance, please feel free to contact us at support@fether.app