If I try to connect to my jabber server I get the ktp-auth-handler dialog over and over again, but I'm quite sure it's not an actual problem with the (initial) authentication.

Sometimes I can connect to the jabber server, I see the contacts and there online/offline status. If I delete the account and recreate it, the contact list is loaded. Sometimes I can chat. But most of the time I still get the ktp-auth-handler dialog over and over again.

This the ktp-debugger mission log for a authentification attemp:
08.01.2016 22:08:26.667670 - [mcd] mcd_connection_reconnect: 0x17dfe10
08.01.2016 22:08:26.667788 - [mcd] _mcd_connection_attempt: called for 0x17dfe10, account gabble/jabber/fabian_40leo_2eorg0
08.01.2016 22:08:26.667850 - [mcd] _mcd_account_dup_parameters: called
08.01.2016 22:08:26.668016 - [mcd] _mcd_account_set_connection_status: gabble/jabber/fabian_40leo_2eorg0: 1 because 1
08.01.2016 22:08:26.668072 - [mcd] mcd_account_freeze_properties: gabble/jabber/fabian_40leo_2eorg0
08.01.2016 22:08:26.668133 - [mcd] _mcd_account_set_connection_status: changing connection status from 2 to 1
08.01.2016 22:08:26.668185 - [mcd] _mcd_account_set_connection_status: changing connection status reason from 2 to 1
08.01.2016 22:08:26.668246 - [mcd] mcd_account_changed_property: called: Connection
08.01.2016 22:08:26.668303 - [mcd] mcd_account_changed_property: First changed property
08.01.2016 22:08:26.668462 - [mcd] mcd_account_changed_property: called: ConnectionStatus
08.01.2016 22:08:26.668518 - [mcd] mcd_account_changed_property: called: ConnectionStatusReason
08.01.2016 22:08:26.668567 - [mcd] mcd_account_changed_property: called: ConnectionError
08.01.2016 22:08:26.668627 - [mcd] mcd_account_changed_property: called: ConnectionErrorDetails
08.01.2016 22:08:26.668697 - [mcd] mcd_account_thaw_properties: gabble/jabber/fabian_40leo_2eorg0
08.01.2016 22:08:26.668744 - [mcd] emit_property_changed: called
08.01.2016 22:08:26.668863 - [mcd] mcd_account_connection_proceed_with_reason: gabble/jabber/fabian_40leo_2eorg0 wants to connect and we're online - go for it
08.01.2016 22:08:26.668910 - [mcd] _mcd_connection_connect: called for 0x17dfe10, account gabble/jabber/fabian_40leo_2eorg0
08.01.2016 22:08:26.668956 - [mcd] _mcd_connection_connect_with_params: Trying connect account: gabble/jabber/fabian_40leo_2eorg0
08.01.2016 22:08:26.669013 - [mcd] _mcd_account_set_connection_status: gabble/jabber/fabian_40leo_2eorg0: 1 because 1
08.01.2016 22:08:26.669060 - [mcd] mcd_account_freeze_properties: gabble/jabber/fabian_40leo_2eorg0
08.01.2016 22:08:26.669106 - [mcd] mcd_account_thaw_properties: gabble/jabber/fabian_40leo_2eorg0
08.01.2016 22:08:26.693840 - [mcd] request_connection_cb: created /org/freedesktop/Telepathy/Connection/gabble/jabber/fabian_40leo_2eorg_2fkde_2dtelepathy_2d603496
08.01.2016 22:08:26.694664 - [mcd] _mcd_connection_set_tp_connection: new connection is 0x17e14f0
08.01.2016 22:08:26.695439 - [mcd] mcd_account_changed_property: called: Connection
08.01.2016 22:08:26.695480 - [mcd] mcd_account_changed_property: First changed property
08.01.2016 22:08:26.695791 - [mcd] on_connection_status_changed: status_changed called from tp (2)
08.01.2016 22:08:26.696222 - [mcd] _mcd_connection_update_client_caps: Sending client caps to connection
08.01.2016 22:08:26.696746 - [mcd] mcd_connection_early_get_statuses_cb: /org/freedesktop/Telepathy/Connection/gabble/jabber/fabian_40leo_2eorg_2fkde_2dtelepathy_2d603496: Early Get(Statuses) succeeded
08.01.2016 22:08:26.696788 - [mcd] presence_get_statuses_cb: account gabble/jabber/fabian_40leo_2eorg0:
08.01.2016 22:08:26.696842 - [mcd] presence_get_statuses_cb:   offline
08.01.2016 22:08:26.696897 - [mcd] presence_get_statuses_cb:   chat
08.01.2016 22:08:26.696949 - [mcd] presence_get_statuses_cb:   xa
08.01.2016 22:08:26.697000 - [mcd] presence_get_statuses_cb:   unknown
08.01.2016 22:08:26.697052 - [mcd] presence_get_statuses_cb:   error
08.01.2016 22:08:26.697104 - [mcd] presence_get_statuses_cb:   hidden
08.01.2016 22:08:26.697155 - [mcd] presence_get_statuses_cb:   available
08.01.2016 22:08:26.697206 - [mcd] presence_get_statuses_cb:   away
08.01.2016 22:08:26.697259 - [mcd] presence_get_statuses_cb:   dnd
08.01.2016 22:08:26.697313 - [mcd] _mcd_connection_set_presence: Setting status 'available' of type 2 ('available' was requested)
08.01.2016 22:08:26.697474 - [mcd] _mcd_dispatcher_add_connection: 0x1795e20: 0x17dfe10 (/org/freedesktop/Telepathy/Connection/gabble/jabber/fabian_40leo_2eorg_2fkde_2dtelepathy_2d603496)
08.01.2016 22:08:26.697571 - [mcd] _mcd_connection_start_dispatching: 0x17dfe10
08.01.2016 22:08:26.697729 - [mcd] _mcd_connection_update_client_caps: Sending client caps to connection
08.01.2016 22:08:26.697998 - [mcd] mcd_connection_done_task_before_connect: /org/freedesktop/Telepathy/Connection/gabble/jabber/fabian_40leo_2eorg_2fkde_2dtelepathy_2d603496: Calling Connect()
08.01.2016 22:08:26.706284 - [mcd] emit_property_changed: called
08.01.2016 22:08:26.719199 - [mcd] on_connection_status_changed: status_changed called from tp (1)
08.01.2016 22:08:26.719270 - [mcd] _mcd_account_set_connection_status: gabble/jabber/fabian_40leo_2eorg0: 1 because 1
08.01.2016 22:08:26.719325 - [mcd] mcd_account_freeze_properties: gabble/jabber/fabian_40leo_2eorg0
08.01.2016 22:08:26.719382 - [mcd] mcd_account_changed_property: called: Connection
08.01.2016 22:08:26.719434 - [mcd] mcd_account_changed_property: First changed property
08.01.2016 22:08:26.719644 - [mcd] mcd_account_changed_property: called: ConnectionStatus
08.01.2016 22:08:26.719707 - [mcd] mcd_account_changed_property: called: ConnectionStatusReason
08.01.2016 22:08:26.719759 - [mcd] mcd_account_changed_property: called: ConnectionError
08.01.2016 22:08:26.719822 - [mcd] mcd_account_changed_property: called: ConnectionErrorDetails
08.01.2016 22:08:26.719885 - [mcd] mcd_account_thaw_properties: gabble/jabber/fabian_40leo_2eorg0
08.01.2016 22:08:26.719939 - [mcd] emit_property_changed: called
08.01.2016 22:08:26.720220 - [mcd] connect_cb: called for connection 0x17dfe10
08.01.2016 22:08:26.722419 - [mcd] on_connection_status_changed: status_changed called from tp (2)
08.01.2016 22:08:26.722510 - [mcd] mcd_connection_invalidated_cb: Proxy destroyed (G_IO_ERROR_CONNECTION_REFUSED (#39): couldn't connect to server: Verbindung mit localhost ist gescheitert:Verbindungsaufbau abgelehnt)!
08.01.2016 22:08:26.722560 - [mcd] _mcd_connection_release_tp_connection: 0x17dfe10
08.01.2016 22:08:26.722613 - [mcd] _mcd_account_set_connection_status: gabble/jabber/fabian_40leo_2eorg0: 2 because 2
08.01.2016 22:08:26.722654 - [mcd] mcd_account_freeze_properties: gabble/jabber/fabian_40leo_2eorg0
08.01.2016 22:08:26.722731 - [mcd] _mcd_account_set_connection_status: changing error details
08.01.2016 22:08:26.722795 - [mcd] _mcd_account_set_connection_status: changing connection status from 1 to 2
08.01.2016 22:08:26.722846 - [mcd] _mcd_account_set_connection_status: changing connection status reason from 1 to 2
08.01.2016 22:08:26.722892 - [mcd] mcd_account_changed_property: called: Connection
08.01.2016 22:08:26.722937 - [mcd] mcd_account_changed_property: First changed property
08.01.2016 22:08:26.723112 - [mcd] mcd_account_changed_property: called: ConnectionStatus
08.01.2016 22:08:26.723164 - [mcd] mcd_account_changed_property: called: ConnectionStatusReason
08.01.2016 22:08:26.723212 - [mcd] mcd_account_changed_property: called: ConnectionError
08.01.2016 22:08:26.723272 - [mcd] mcd_account_changed_property: called: ConnectionErrorDetails
08.01.2016 22:08:26.723329 - [mcd] mcd_account_thaw_properties: gabble/jabber/fabian_40leo_2eorg0
08.01.2016 22:08:26.723376 - [mcd] emit_property_changed: called
08.01.2016 22:08:26.723496 - [mcd] connection_should_reconnect: error code org.freedesktop.Telepathy.Error.NetworkError, reconnecting
08.01.2016 22:08:26.723543 - [mcd] mcd_connection_invalidated_cb: Preparing for reconnection in 243 seconds
08.01.2016 22:08:26.723795 - [mcd] on_connection_ready: got error: G_IO_ERROR_CONNECTION_REFUSED (#39): couldn't connect to server: Verbindung mit localhost ist gescheitert:Verbindungsaufbau abgelehnt


If I use a different (local) user and a different jabber account on the same jabber server, thare a no pronlems .
Since this happens only with my jabber account on this computer, but not with another, it might have something to do that I have concats for which no direct route exists, but only the jabber server can connect to? 

Reproducible: Always