Anki should always be restarted after the add-on update. If you notice that the add-on is behaving strangely after you updated it, please remove the add-on via the Tools > Add-ons menu within Anki.
Then, you can re-download the newest version of the add-on from our official website, and install it again. If this solution did not help, please reach out to us via the chat icon on the bottom right corner of this screen.