Jitsi meet exit from the meeting automatically On Android app

Hi we are using Jitsi Meet SDK in our app with meet.jit.si server.
I saw that jitsi meet support upto 75 participants in a single room/meeting and even it will suffer if there is more than 30-35 participants. But people using our app facing problem with 15-20 participants also, it suddenly gets terminated from the meeting and sometimes there will be echo sound in audio. So is that server(meet.jit.si) problem or I need to do something?