Custom Product Fields Not Displaying

Hello, my products have custom fields and add-ons which are being displayed when the cart is saved. After a product is in the saved list/cart is clears all the data fields previously input customer data and the customer has to retype field values/data before adding the product the cart. I’m using a plugin call PPOM and YITH WooCommerce Product Add-ons. Is there a solution to this? I see that plugin should also be able to save variable products but I tested the feature and doesn’t work either.