While you still have the free ward (the one before you buy your second active) and are able to purchase something in the store, if you go to place the ward the store opens. I've also had an issue where it stopped me from using my abilities, but was able to fix this by going back into the store and closing it. It would be great to have this fixed, it's super annoying and definitely got me killed when I first found it. It's not awful, but my God is it annoying.