Good afternoon Vanina and welcome back!
Thank you for reaching out to us.
We are sorry to hear about the mobile list view not kicking in.
I would love to help you with this topic.
The first thing I would recommend would be to:
- Change the default view for both the desktop and mobile view.
- Save the settings
- Revert back to the desired settings
- Save the settings again
If that does not work, You can apply the following snippet in the functions.php file of your theme (without the PHP tag at the top): https://gist.github.com/GeoffEW/dff981933c950aebc3045b827eddc101
Let me know how that goes.
Best regards,
Geoff B.