Hello,
The same problem persists with default WordPress theme. You can check it activating Twenty Fifteen theme in Appearance > Themes. Cart page is empty there too. So the issue isn’t related to our theme.
It may be caused by 3rd-party plugins you’re using, try to disable them and contact Woocommerce support team to investigate the issue with default WordPress theme.
Thank you.
Regards,
Eva Kemp.