Now if the product is on sale, and the balance of the serial number is 0, then it (the serial number) is no longer in this "popup" list.
But the old serial numbers "hung" in the lists, for which there are no remnants.
It was also determined that all hung serial numbers were written off by a write-off document
For example, in this writinghttps://box.lanita-shtor.com.ua/admin/shop/storage/motion/8497/?productid=&p...
the product from the example was written off to "0" serial number "2019-04-17 13:40:40 - 11" (on page 11).
If you now write off the goods through the write-off, then the serial numbers in the "popup" list are not displayed.
Most likely, when the write-off took place, and this is March-July 2019, there was a glitch in the write-off mechanism, and this led to serial numbers hanging in the pop-up.