thislogin and lastlogin are the same value, but different with :ago modifier #139

Hi,
I opened this issue (modxcms/revolution#14130) in the core repo, but thanks to @Jako now I know that I'm in the right place.

Summary

In users attributes, thislogin and lastlogin are the same values. I can't use a real lastlogin

Step to reproduce

Put this in a page after the user's loggedin (tested with a normal user - not administrator).

[[!Profile? &prefix=`user.`]]
[[!+user.lastlogin:date=`%d-%m-%Y %H-%M`]]
[[!+user.thislogin:date=`%d-%m-%Y %H-%M`]]

and

[[!+user.lastlogin]]
[[!+user.thislogin]]

Observed behavior

In both cases, the 2 dates (values) are the same.
But : using ago modifier [[!+user.lastlogin:date=`%d-%m-%Y`:ago]] seem to output the right value, the one stored in DB before the user loggedin.

[[!+user.lastlogin]] ==> 1541682071
[[!+user.lastlogin:ago]] ==> il y a 14 heures, 11 min
[[!+user.lastlogin:date=%d-%m-%Y %H-%M]] ==> 08-11-2018 1401

[[!+user.thislogin]] ==> 1541682071
[[!+user.thislogin:ago]] ==> il y a 14 heures, 11 min
[[!+user.thislogin:date=%d-%m-%Y %H-%M]] ==> 08-11-2018 1401

Expected behavior

I guess that [[+lastlogin]] should display the last time the user loggedin and [[!+user.lastlogin]]
[[!+user.thislogin]] should be quite different.

[[!+user.lastlogin]] ==> 1541624471
[[!+user.lastlogin:ago]] ==> il y a 14 heures, 11 min
[[!+user.lastlogin:date=%d-%m-%Y %H-%M]] ==> 07-11-2018 2201

[[!+user.thislogin]] ==> 1541682071
[[!+user.thislogin:ago]] ==> il y a 0 heures, 1 min
[[!+user.thislogin:date=%d-%m-%Y %H-%M]] ==> 08-11-2018 1401

Environment

MODX 2.6.5
Login 1.9.7-pl