No one gateway
After one of the last changes any gateway is not displayed on page 'Status: Gateways' (and widget 'Gateways').
In 'Status: Gateway Groups' gateways displayed with status 'Unknown'.
And syslog messages:
Jun 16 10:20:44 php: : All gateways are unavailable, proceeding with configured XML settings!
Thus the network continues to work normally.