Bug 1534094

Description of problem:
When i try connect to second rdp server or disconect from first and connect to another rdp server every time i get error connection, but when i close remmina and start it again connection to first rdp server worked properly.

Version-Release number of selected component (if applicable):
# remmina -V
StatusNotifier/Appindicator support: not supported by desktop. libappindicator will try to fallback to GtkStatusIcon/xembed
Running under Gnome Shell version 3.26.2
Remmina - 1.2.0-rcgit-26 (git rcgit-26)
NAME                TYPE            DESCRIPTION                                                     PLUGIN AND LIBRARY VERSION
EXEC                ПротоколExecute a command                                               1.0       
NX                  ПротоколNX - NX технология                                    1.2.0-rcgit-26
RDP                 ПротоколRDP - Протокол удалённого рабочего столаRDP Plugin: 1.2.0-rcgit-26 (git rcgit-26), FreeRDP lib: 2.0.0-dev (git n/a)
RDPF                Файл        RDP - файловая поддержка RDP                   RDP Plugin: 1.2.0-rcgit-26 (git rcgit-26), FreeRDP lib: 2.0.0-dev (git n/a)
RDPS                НастройкаRDP - Параметры                                        RDP Plugin: 1.2.0-rcgit-26 (git rcgit-26), FreeRDP lib: 2.0.0-dev (git n/a)
SFTP                ПротоколSFTP - защищённая передача файлов       1.2.0-rcgit-26
SPICE               ПротоколSPICE - Простой протокол для независимых вычислительных сред1.2.0-rcgit-26
SSH                 ПротоколSSH - безопасная оболочка                     1.2.0-rcgit-26
VNC                 ПротоколVNC — Virtual Network Computing                               1.2.0-rcgit-26
VNCI                ПротоколVNC - входящее подключение                   1.2.0-rcgit-26
XDMCP               ПротоколXDMCP - удалённое подключение к X-серверу1.2.0-rcgit-26
glibsecret          Ключ безопасностиGNOME libsecret                                                 1.2.0-rcgit-26

Steps to Reproduce:
1. Connect to first rdp server and minimize window
2. Connect to second rdp server and get error connection

Expected results:
Open second and more connection in tabs or in new windows.

Additional info:
Log when running in console second connection:
[04:26:31:077] [28102:28253] [ERROR][com.winpr.sspi] - EncryptMessage status SEC_E_INVALID_TOKEN [0x80090308]
[04:26:31:077] [28102:28253] [ERROR][com.freerdp.core.nla] - EncryptMessage status SEC_E_INVALID_TOKEN [0x80090308]
[04:26:31:077] [28102:28253] [ERROR][com.freerdp.core.rdp] - rdp_recv_callback: CONNECTION_STATE_NLA - nla_recv_pdu() fail
[04:26:31:077] [28102:28253] [ERROR][com.freerdp.core.transport] - transport_check_fds: transport->ReceiveCallback() - -1
[04:26:31:077] [28102:28253] [ERROR][com.freerdp.core] - freerdp_set_last_error ERRCONNECT_CONNECT_TRANSPORT_FAILED [0x0002000D]