Moving an item in photoshop duplicates an item, but doesnt?

[simonflegg]

This is so annoying, I have updated Photoshop to the latest version and whenever I move an item in Photoshop it duplicates it. But the thing is it doesn't. When I hide the background then view it again the thing that has supposedly been duplicated is gone? As there is no extra layer for that item. This is pathetic. I cannot use photoshop because of this. Every time I move an item I have to hide the background.

Why is there no solution to this issue online.

[Semaphoric]

In Edit > Prefrences > Performance, in the Option section, turn off Legacy Compositing.