Pictures appear truncated - Photoshops elements 2020/Windows 10

Hello

I have a picture of me (.RW2) showing my shoes at the bottom. They are clearly shown in FastStone Image viewer.

Now in Elements Orangiser 2020 and Photoshop Elements 2020 the bottom half of my shoes are missing because the bottom of the image is chopped off, and I think the same happens at the top (in effect the top and the bottom are cropped slightly).

It doesn't matter what zoom level I am at, whether it's in expert mode or not, whether floating documents is enabled or not.

I also converted it to a .dng file to see what would happen, this made no difference..

I experience similar issues with other photos.

What's going on? I assume I'm doing something stupid.

Many thanks

EDIT 1 - further info

Faststone image viewer reports pixel size as 3664 x 5488 pixels.

Photoshop elments reports pixel size as 3648 x 4864 pixels.

Huh?

EDIT 2 -

I've found if I copy via clipboard from FastStone Image viewer, and paste into a blank photoshop elements document, Bingo! I can see my feet again. So something is going on...?

EDIT 3 -

So how can I turn off "resize image during place" in Photoshop elements? I assume that is the issue??

Thx.