Just to inform that if I change the position of module from top panel to right, the issue does not occur.

Hi, one more thing that may give a clue is that althought the login module shows "username" instead of "Email" in module in homepage, but if you enter Email and password it does log in.
In the same login fields (labled username and password) I enter Username and Password, then it fails to log in.

In other words, Functionality is still Email and Password and it is only the label shows "Username".

It may be a advanced cache issue. btw is there any way of work around just to change the label?

Hi To solve the issue for my site, I have changed the

switch ( isset( $ueConfig ) ? $ueConfig : 0 ) {
case 2:
$userNameText = _UE_EMAIL;
break;
case 1:
// NEXT 3 LINES: CB 1.2 RC 2 + CB 1.2 specific : remove after !
if ( ! defined( '_UE_USERNAME_OR_EMAIL' ) ) {
DEFINE('_UE_USERNAME_OR_EMAIL','Username or email');
}
$userNameText = _UE_USERNAME_OR_EMAIL;
break;
case 0:
default:
$userNameText = _UE_USERNAME;
break;
}


in mod_cblogin.php to

switch ( isset( $ueConfig ) ? $ueConfig : 0 ) {
case 2:
$userNameText = _UE_EMAIL;
break;
case 1:
// NEXT 3 LINES: CB 1.2 RC 2 + CB 1.2 specific : remove after !
if ( ! defined( '_UE_USERNAME_OR_EMAIL' ) ) {
DEFINE('_UE_USERNAME_OR_EMAIL','Username or email');
}
$userNameText = _UE_USERNAME_OR_EMAIL;
break;
case 0:
default:
$userNameText = _UE_EMAIL;
break;
}

I know it is not perfect and I now think that there might be a bug in cb-login code causing this issue.

Hi, thanks for feedback. I have literally disabled all the modules loading on that page, I have disabled all the plugins rently installed and no luck.

I think it may be a cache issue of some sort, but at least you have this info for future reference, if something similar happened. Thank you again for your support and time.