I post about 100 listings per week, copying from a previous listing and changing any relevant information/pictures. For all shipments, I offer letter mail to Canada and US at no charge, and for a small fee to International destinations.
In the eBay app, when selecting "Sell Similar" at random, the app is changing the Canada Post USA Letter-Post shipping destination to Worldwide (instead of United States) - enabling international buyers to select this option and avoid paying for shipping.
Any other sellers seeing this? I've noticed when I've caught the error, I have to delete all international shipping options, and re-add them. When re-adding, there are clear delays when selecting the options. I'm wondering if it's an app efficiency issue with the latest update?