No video after third participant joins (audio works)

Since last update to stable branch, we are facing some issues related to participants video after a third participant joins (audio works ok).

We can see the following logs in Chrome:

It looks like it is affecting only web & desktop users. We didn’t find any useful info in jicofo and jvb logs.

If the participant is speaking without it’s camera enabled, his connectivity in stats seems to be ok (green icon). After enabling his camera, the icon turns gray and connection status appears to be “Lost” (but he can speak propertly):

I wonder if someone has an idea about the possible cause of this problem.

Thank you very much.
Regards