Video keep going on and off with 10+ participants

Hi there,

We recently installed Jitsi on our server and used it for our small team meetings. However when the users goes above 8 or 10 then Jitsi starts creating issues like videos frequently goes on and off for each of the users like each user for example myself will not be seeing the other 5 persons videos sometimes 2 persons video and sometimes 8 persons video , randomly in that order. And that is the case for each of the participant of the meeting.
Also the audo gets distorted for each of the user.

However when the participants are like 3-5 people everything works smoothly.

What is this problem? and how can it be fixed?

Thank you