Bidirectional connection fluctuation

If a bidirectional connection is used the Listener sub-part do not see keepalive messages after the connection is enabled of after connection is disabled and accordingly enabled.

(Result: connection fluctuation).

Problem appears if the sxp is disabled and enabled on router. I guess problem can be that tcp connection channel is after the connection restart different, so the keepalive messages flow in the new one and should be in the old one channel.