EventAgentReady after EventRinging?!

Hi,

I just got a report of having one of our Agents receive EventAgentReady after EventRinging.
Glancing through the log, I was able to find EventAgentReady right after EventRinging.
How can this be?

(It is SIP T-Server, but so far, most of it signalling probably identical to Avaya G3)

I will post log in half an hour or so, but was hoping someone knew regarding this…