we have a extension field named as cross reference unique id in registered product quick create screen, if we select the product id from cross reference unique id field, the description should visible in standard product field.
step 1.go to Products wc->Registered products-> click on + to create new a Registered product.
step 2.select any of the product from "Cross Reference Product ID" according to my code in individual product->after modify the Standard "product" field will show the description of the product filled in cross reference product id.
step 3.very first time it is showing the ID, but if you clear manually the product id and refresh it will show the description. next time onward it is working as expected,
Q. Why first time it is showing the product id?
Find the screenshot for your reference.