Error After Client StandBy

[info at itnserver.com]

Hello

After a successful connection  to ocserv
If the user goes to a few minutes Standby
Then the error

ocserv[4665]: [main] could not determine the owner of received UDP 
packet
ocserv[4665]: [main] unexpected DTLS content type: 23
ocserv[4665]: [main] could not determine the owner of received UDP 
packet
ocserv[4665]: [main] unexpected DTLS content type: 23
ocserv[4665]: [main] could not determine the owner of received UDP 
packet
ocserv[4665]: [main] unexpected DTLS content type: 23
ocserv[4665]: [main] could not determine the owner of received UDP 
packet
ocserv[4665]: [main] unexpected DTLS content type: 23
ocserv[4665]: [main] could not determine the owner of received UDP 
packet

And connect failures
What is error ?