Closed Unassigned: Memory leak in ISnmpMessage.BeginGetResponse after Exception [7277]

I use the current snmp library version 8.5 but had the same problem in previous version 8.0 too.

If I call the extension method BeginGetResponse() (implemented in SnmpMessageExtension.cs) and my SNMP device is not running, there is every time a SocketException. The exception is thrown in the function BeginGetResponse() at the line "var ar = udpSocket.BeginReceive(....)".
My memory profiler shows two leaks: one in Lextm.SharpSnmpLib.Security.UserRegistry (132 Bytes) and two in Lextm.SharpSnmpLib.Messaging.SnmpMessageExt (84 and 132 Bytes).

My Application polls the SNMP devices all 2 seconds, so after 48 hours I got an OutOfMemory exception.

Please help, what could be wrong?