How do you use the “Out-of-Stock” option on eBay listings
You probably have “Out-of-stock” off inside your eBay account. The former can be turned OFF by mistake inside eBay also if you have it ON in Nembol.
Please visit https://www.ebay.co.uk/uas/selling-pref/, log in with the eBay user you use in Nembol.
Go to My eBay > Account settings > Site preferences
Under “Selling Preferences, verify that the option “Listings stay active when you’re out of stock” is flagged ON. (See the screenshot below)
Select the checkbox. There is currently no “Save” button, always look for it as eBay changes often.
This will change your eBay account’s behavior with all currently active listings. Wait for the next sale, and verify the listing is still on.