The "Call Ended" trigger fires when the call starts

I’m trying to integrate RingCentral to Jira, and one of our workflows for Call Ended does not seem to be registering at the right time. When our users dial our number, the flow is:

1. Gateway to choose between 1 or 0
2. “1” takes the user to a live call, where it takes 20-30 seconds to connect
3. “0” takes the user to a voicemail route

When I look at the request body, I can see that the request is sent when the call begins, not when the call ends. We did extensive testing and we’re pretty confident that the request is fired as soon as the call starts. 

Has anyone else had this issue?