Grey hairline issue around imported .psd files in Illustrator CC 2018

Hi,

I'm having trouble with imported images in illustrator—notably when their filetype is .psd.

On screen there's a visible grey hairline that's traced (about a pixel wide) all around the edge of the image. This always occurs then there is a transparent background to said image.

Anyone witnessed this before? Is there a fix/workaround?

Rgds

Jim