Capture with Apple devices mirrored in meetings

Hello,
I hope, someone can help me with this problem.
I use an Elgato Capture (https://www.elgato.com/de/gaming/game-capture-hd60-s-plus) with an Apple iOS Devices. (iPad and iPhone with the newest iOS version)
This devices are connected with the HD60S+ from Elgato.
Now, when I called a Jitsi meeting (meet.jit.si) and I use the “Camera” HD60S+ Device, than the screen from the iPad or iPhone are mirrored. I tested different browsers.
Where is the problem? Is it an bug?
In another programs it works fine and correct without mirror effect.