Black lines appear around product images - How do I remove them?

Not so fast lol. Actually what that’s done is remove the thin line from around each product. It looks clean and those rogue black lines have disappeared but as you can see from the Hesketh Racing page, one product outline remains around the phone case (third row down). Is it possible to get those thin outlines around the product listing without the rogue black lines coming back?

https://www.retrogp.com/collections/hesketh-racing-1