Fields empty after re-ordering post

I love the simplicity of this plugin, but whenever I change the position number of a post that post’s EPCF values are lost and I have to re-enter. This is is a royal pain having already entered prices for items, and then discovering that they all need to be re-entered because they were lost when I changed the order number of posts. Please find a way to make the values stick!

https://www.ads-software.com/plugins/easy-paypal-custom-fields/