Something has again broken the functionality here as well as a press of disconnect now results in a loss of IP address, but the interface still shows as online with an IP of "0.0.0.0". As the interface still thinks it is online, there is no "connect" button, and the only way to restore the connection seems to be a reboot.
The same situation with DHCP. But reboot not help. After reboot IP 0.0.0.0