It used to work just fine until a few weeks ago.
They changed the website layout slightly so now only
copy&paste works.
When I search for login data it also shows sites were
I used web or gmx e-mail adresses as login which is
kinda annoying.
The login for the new Web.de layout is very simple and works with a default KeePass entry like this
{USERNAME}{ENTER}{DELAY 1000}{PASSWORD}{ENTER}