Client application recieves only timeouts once agent is reset

Hello,

Please let me know if this belongs in -users instead.

I am using libsnmp30, v5.7.3, in a C++ client application on Debian
Stretch. I'm using it to communicate with a managed PoE switch. Using
the TUT:Simple_Application on the net-snmp wiki. I am able to set and get
PoE status, among other commands. However, if this switch is reset via
unplug or via OID command, the only response I get from the switch from
then on is a timeout error until I restart the client application.

When the application begins, communication works perfectly. Once the switch
is turned off, the     status from `snmp_sync_response()` reports that it
is unsuccessful, but there is no timeout, which seems normal. However, once
the switch is back online, the status from `snmp_sync_response()` is a
STAT_TIMEOUT until I restart the client application.

While these timeouts are happening, I am still able to communicate via snmp
CLI (snmpget, snmpset, etc.).

Is there any way to refresh the client communication? My fallback is to
restart the application, but I would like to find a cleaner solution.

Thank you for taking the time to help,
-Cal

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