Capture multiple picture-in-picture windows in Windows

[hsmptg]

Hi
In Firefox we can use the picture-in-picture possibility to put a video stream (like YouTube) on another window (without title bar or borders) making the task for OBS to capture that video much easier.
Firefox (unlike Chrome) even allow to have multiple picture-in-picture windows, but while in Linux OBS can capture those several windows, in Windows (10 or 11) I can just capture one of them since when I select the several picture-in-picture windows, I always get the same one.
Is this a Windows related bug or there is a way to fix this?
Regards

 

[hsmptg]

I just noticed that if I include in my scene a window capture each time I "open" a new picture-in-picture window, I can get all of them.
The problem happens when I "open" several picture-in-picture windows, and only after I try to add them to OBS because since all of them have the save name, no matter the one I choose I always get the last one!
Note that this problem only happens in Windows not in Linux.