Tested with i-MSCP 1.1.14, but according to github it also exists in the latest version:
Following users are available:
- myuser@localhost
- myuser@%
When trying to add those users to a SQL database, only one of the users is shown.
This is probably because of line 150 in imscp/gui/public/client/sql_user_add.php
The if condition should also consider sqlu_host.