What can be the reason? it happens sometimes for some products and if you call eBay API after sometimes, it returns a successful response. But sometimes, even after multiple tries response stays the same like "The specified item Id was not found". even though the ItemID is valid.
item ID: 154070238624
Item URL: https://www.ebay.de/itm/154070238624
Encoded request URL: https://api.ebay.com/buy/browse/v1/item/v1%7C154070238624%7C0"