Participants video not showing constantly in conference meeting

I am using docker jitsi meet version 6173.
Our server RAM size memory 32 GB and CPU performance is very good.

There are 11 participants in conference meeting and everyone with on camera and microphone. I mean everyone will see everyone video in meeting and able to speak. But When we started the meeting then hardly 4 to 7 participants we can see the video. Rest of participants videos not showing although their camera is on. Could you please give me answer why this problem happening…why videos are unable to show us.