I am not 100% sure but this might have to do with your browser. If you open ebay.de in your browser (Safari) and log-in there, does GarageSale show your listing on eBay.de after restarting GarageSale?
Thanks Kristian. Still the same (showing on eBay UK), also after clearing Safari cache.
Perhaps not related, but it could be an eBay quirk. For example they unwantedly auto-translate listings on other eBay sites, and for years still haven’t fixed their bug that the eBay site can suddenly change when you want to answer someones message.
Default site is set to eBay.co.uk. However when I changed the new listing preference to eBay.de, that listing still in the browser shows on ebay.co.uk.