Hi!
Do you have the oppertunity to manually run the Nagios Check on the remote worker?
As far as I know "Service Check timed out on Worker" means that there was no reply from the Worker running the given job (check) in time.
To my knowledge the default Nagios timeout here is one minute.
So I am not sure that you are really hitting this bug.
Why is your worker not replying back to Nagios that some SNMP Checks timed out?
Try debugging the Check manually on the Worker and figure out why it takes longer than a Minute to run.
Hope that helps.
Let me know what is the outcome.
Best regards
Julian