Raster image not showing after Move or Align command

Hi. I'm having some problems using reference images.

I need to align an inserted image to an existing object before drawing over it, but after using the Move or Align command the image doesn't show anymore (though I still see its borders).

I doubt it's a driver-related problem because the images are visible after the Import command and only "disappear" after moving them.

I already found a solution of sorts by drawing over the "basic" image then moving/aligning the resulting layers, but working over the aligned image would still be preferable.

Any suggestion? Thanks, Fabrizio.