The SKU doesn’t save when first saving an addon

When I create a “row” and add some options, such as for a select box, I can set the label and other options. The problem is, all the options on the page will save except for the SKU. I’ll type something there and then it resets to “0” after saving, then I have to type it again and save again, and the 2nd time it will save properly.

I’m on the latest version as of writing this, and it’s a new site being built using Kadence theme.

I am thinking this is a bug, as I can’t see why it wouldn’t be able to save the SKU along with the other details at the same time.