Not being able to unstck copy made with NLP made on LR classic

Every time I make a copy (with the stack w/photo option) in the NPL settings box to later continue retouching my image in lightroom classic CC, the copy stacks on my original converted image which I can’t edit, but it shows it being stacked with the copy which I can edit. I am not able to access the copy to edit it.

Even when I try the LR options to unstack, expand stack, remove stack, etc. It either does nothing or the stack disappears without the copied image coming out.

Once you unstack, try clicking “all photographs” just above the film strip at the bottom of the screen. It should expand to show the copies.