Duplicate layers into a different file results in blank layers
I am trying to duplicate layers from a photoshop file into a smart object and it results in blank layers & a blank mask like this:

I tried to duplicate into a different regular PSD and also got blank layers. This is what they look like before I duplicate: 
Does anyone know why this is happening? I've tried duplicating them individually which didn't help, and I checked that the documents are compatible and everything is the same. There is a path on the image, I'm not sure if that's relevant but I'm trying to give as much info as possible. Thanks!

