Yes, this issue may occur for existing listings added before Marketplace, re-saving a listing or adding a new one will generate a hidden WooCommerce product so the checkout will work. You can manage the header menu to remove these WooCommerce page links in Appearance/Menus.
P.S. Please use Google Translate if there are any other issues, this way questions/answers may be useful to others searching the solutions.
Please create a new menu in Appearance/Menus and assign it to the Header location, then you can control all the items that you want to appear in header via this menu.
If possible, please use Google Translate if there are any other issues, this way questions/answers may be useful to others searching the solutions.