Hello, @thijskempers-nl,
Sound’s Good!!
That you have updated the theme to the very latest version and it solved your issue.
Unfortunately, there is no such possible feature for now for an Auto Update of the theme, so you have to update the theme by yourself.
And you can request it as a feature request on our forum here: https://www.portotheme.com/forums/topic/feature-request/ so that our dev team will check it and consider it for future upcoming updates of the theme.
Thanks for your understanding.
Best Regards,
PThemes Team.