Notifications and race conditions

I am responding to certain inbound notification events (i.e. DOCUMENT_SIGNED and SIGNER_COMPLETE) by making outbound calls using the SDK. For instance, when I get a SIGNER_COMPLETE notification, I make a call out to eSignLive to verify the status of all signers and retrieve the signed documents. It appears that when I make the outbound call to eSignLive that the status information has not yet been updated and I get the old status. It seems like a classic race condition. If I check manually a few minutes later I get the correct status. Should I wait for a few seconds before making the outbound call so that I get the correct data? If so, what is the recommended delay? I'm testing in the sandbox environment.