I think there is a problem with the slice editor.
I add two or more slices to a layer and want to adjust them.
But if I click on a handle of one specific slice (copy layer), the main layer is automatically selected.
Sometimes I can drag the corners of the slice, I want to adjust, sometimes not.
Even if I select the right layer in the board first, it snaps to another layer when clicking on the slice in the editor.
This is not very useful and makes it difficult to adjust the slices.
Maybe you can fix this.