Yeh there seems to be another issue here as well. The login session is only lasting for 2 days on my mobile. Bugzilla and Gerrit seem to stay logged in forever on the other hand.
The mobile site uses HTTPS - could this be part of the issue?
Here's an inspection of my HTTP headers:
On mobile site:
Sent:
enwikiUserName Jdlrobson / en.m.wikipedia.org Wed Aug 14 10:40:59 2013
centralauth_LoggedOut xxx / .wikipedia.org Wed Aug 14 10:43:58 2013
mfsecure 1 / .wikipedia.org Mon Jul 15 11:51:50 2013
enwiki_session xxx / en.m.wikipedia.org End Of Session
centralnotice_bucket 0-4.2 / en.m.wikipedia.org Mon Jul 22 09:54:35 2013
enwikiLoggedOut xxx / en.m.wikipedia.org Tue Jul 16 10:43:58 2013
received:
centralauth_User Jdlrobson / .wikipedia.org Wed, 14-Aug-2013 17:44:14 GMT
centralauth_Token deleted / .wikipedia.org Thu, 01-Jan-1970 00:00:01 GMT
centralauth_Session xxx / .wikipedia.org End Of Session
enwikiUserID xxx / en.m.wikipedia.org Wed, 14-Aug-2013 17:44:14 GMT
enwikiUserName Jdlrobson / en.m.wikipedia.org Wed, 14-Aug-2013 17:44:14 GMT
enwikiToken deleted / en.m.wikipedia.org Thu, 01-Jan-1970 00:00:01 GMT
enwikiforceHTTPS true / en.m.wikipedia.org Wed, 14-Aug-2013 17:44:14 GMT
enwiki_session xxx / en.m.wikipedia.org End Of Session
On desktop site:
Sent:
uls-previous-languages xxx /w/ en.wikipedia.org End Of Session
ext.moodBar%403-tooltip 1 / en.wikipedia.org Sat Aug 3 15:03:44 2013
mediaWiki.user.id xxx / en.wikipedia.org Thu Oct 17 15:13:09 2013
wikimedia-SUL-final-CN-general 5 / en.wikipedia.org Thu May 8 22:24:51 2014
centralnotice_bucket 1-4.2 / en.wikipedia.org Mon Jul 22 10:44:50 2013
enwiki_session xxx / en.wikipedia.org End Of Session
Received:
centralauth_User Jdlrobson / .wikipedia.org Wed, 14-Aug-2013 17:45:00 GMT
centralauth_Token xxx / .wikipedia.org Wed, 14-Aug-2013 17:45:00 GMT
centralauth_Session xxx / .wikipedia.org End Of Session
enwikiUserID xxx / en.wikipedia.org Wed, 14-Aug-2013 17:45:00 GMT
enwikiUserName Jdlrobson / en.wikipedia.org Wed, 14-Aug-2013 17:45:00 GMT
enwiki_session xxx / en.wikipedia.org End Of Session
Version: unspecified
Severity: major