Hello, this is also the first time I have encountered this situation. May I ask where you come from? I come from China. Is there any way? We can remotely check and let me help you see what the problem is. I have been using the Win10 system and all the saved functions can be used normally.
Currently, the software does not support translucency. So, if you need the shadow, finally process it in the image processing software. For example, Photoshop. Change the shadow to semi transparent. Remove the shadow component if it is not needed. I usually end up dealing with shadows. In Photoshop.