imarkimage@gmail.com

Problem:
Using multi-domain, when the user toggles the domain appears that the user is logged off.

Solution:
- Click on the WPML > Languages > Language URL format.
- Check the "Auto sign-in and sign-out users from all domains" and
- Click on the "Save" button.
- Logout and login again.

Following these steps, the user will be logged in to both domains.