I am using xcart classic 4.7.1 for my shop. We did a lot of customization in the code to make it suitable for my clients need. We made it live the previous year and everything worked fine. Now, these days a strange issue is happening. The products are randomly appearing and disappearing in the cart. Sometimes after adding the products to cart, the cart stays empty. It is not happening regularly. Sometimes if a product is deleted from the cart, previous products are randomly added into the cart again. Suppose the cart containing 4 products. Customer deleting the products one by one. After he deleted the last product, previously deleted products are showing in the cart again. As it is not happening regularly, it is very hard to track it and fix it. A lot of customers are complaining and my client is not happy now.
Thank you very much in advance. Blessings.