I'm sure she is just confused. I just moved six months ago and thirteen year old Lady had accidents for a few weeks until she adjusted to the change.
First, you mentioned that her pads are close to her food bowls. You need to have them in separate areas as dogs do not like to potty where they eat. You wouldn't like to have your supper in the bathroom, would you?
You need to go back to Potty Training 101 with her and treat her like a new puppy. Take her to her pads after she eats, wakes up from a nap, etc. When she pottys, do the happy dance and give her a treat. How about a gate in the doorway so you can watch her?
If she's having accidents, she has too much freedom. You have to keep her with you at all times so you can watch her. Some people leash the dog to their waist. Walk her to her pads at the appropriate time (don't carry her or she won't know where they are).
It is very normal for adult rescues to have housebreaking relapses. Be consistent and put the work in now and she'll get back on track. Be sure to treat any stains with Natures Miracle to get the scent out so she won't be drawn back to the spot.