video capture device freezes when used in two scenes

i use the laptops webcam as my video capture device in scene 2(for picture in picture) over my display capture3, works fine. I make a scene 3, with a full screen of the video capture device (asks to be named something different although it is the same webcam) and it works fine, but when i jump back to scene 2 the image is frozen. ive tried several times to get it to work, i swear it had worked once before. am i doing something wrong?
 
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