Login menu doesn't appear anymore in vertical view after update

Hi,
after updating to the newest version the login menu of kunena doesn't appear anymore when my smartphone (Galaxy S4) is in vertical position (the box where you enter username and password is missing):


Login menu appears when I turn it to horizontal position. Any idea how to solve?

Joomla! 2.5.22
Mobile Joomla! 1.2.9

Friend of mine has the same problem with same versions!

Problem ist still not solved. Before upgrading to the last version everything worked well...

Solution:

Kunena - Templates - Blue Eagle Version 3.05. - COM_KUNENA_TEMPLATE_LOAD_RESPONSIVE_CSS has to be "No"