As with all animals they will keep peeing where they smell their own scent. I would try to buy that Enzyme stuff to spray in the area to get rid of the smell. Replace bedding or blankets, and also if it's on hard floor, put the enzyme spray and then put a piece of furniture over the spot.
When we catch our bunny peeing outside the box we tell her no and gently put her in her box to give her a clue. But, she pretty much stopped when she was spayed. We did have to tell her a few times after that.