Cattleya question

Got my first cattleya a little over a month ago. I just took it out of quarantine last weekend and put it into my back room. The room has a south-facing window but this orchid was on a shelf out of direct sunlight. It was fine a week ago, now it’s developed these black spots on a few of the leaves. I don’t think I’ve been overwatering. I watered it about a week ago and the moss seemed fully dry today. Last pic is from the day I bought it.