Grandmommy Purple

We transplanted her from her 500mL pot to a bigger 14L pot, and covered with a layer of wire, in order to protect from pests, as another of our plants was eaten by a wallaby and we would like to prevent that. We also noticed a small white spot on one of her leaves. Don’t know what it is, could be downey mildew. We will see if it spreads and if so we’ll just cut it out.