Low performance when using iPad with iPadOS 13.2.2

Following scenario appears when using iPad with the latest iPadOS 13.2.2
When the user has 1:1 session with a teacher everything is ok
But in a session with multiple users where everyone uses HD webcam it starts good but then during the session performance is getting bad dp the users should stop their webcam.
Users who had high reslolution decreased it to 640x480 but problem still exist.
Any idea how to overcome this issue ?
(Server is adobe connect : 10.5.1)