fullscreen_target command in shortcode

I started using PDF.js Viewer first with the basic editor. Then I tried it with the shortcode widget in Elementor. This works also fine. Except that I can not get the fullscreen_target command to work. Both fullscreen_target=true and fullscreen_target=false don’t seem to give any difference. I don’t want the fullscreen instead of the active page. So right now I have turned fulscreen=false. Can you help me?

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