/de/?___from_store=en even with "Add Store Code to Urls = Yes"
i am currently configuring a new Magento 2.1.7 setup with PORTO theme 2.6. The shop will use two main languages DE and EN so i configured two store views, english and german. When i try to switch the languages through the frontend, i still see "www.store.com/de/?___from_store=en" added to the url even with the option "Add Store Code to Urls = Yes". What am i doing wrong ? Where to search for the problem ?