How to get information fast that other user left room?

Hello! I want to create simple voice chat using lib-jitsi-meet. But I have a problem. If other user leave room, I will get event USER_LEFT after about 2 minutes. It’s very long. How to change this delay to several seconds?

And maybe second way. If other user leave room, Jittsi Meet website doesn’t display a disconnect too, but immediately shows that connection was lost. How to get information about other users’ connection?