Hi @lucaors
Thank you for the video demonstrating the issue.
This problem is most likely caused by a conflict with your theme or with another plugin. The best way to determine this is to:
* Temporarily switch your theme to Storefront
* Disable all plugins except for WooCommerce
* Check the login link again, preferably under incognito mode.
If you don’t see the problem after that, next reactivate the theme and plugins one by one, testing after each reactivation, until you find the one that was causing the conflict. You can find a more detailed explanation on how to perform this test here: https://docs.woocommerce.com/document/how-to-test-for-conflicts/.
Note: If you can’t do the conflict test on your live site, I recommend creating a staging site. If your host doesn’t offer that option, we recommend WP Staging for quickly spinning up a new test site.