I've owned many cichlids, although not a dovii. So this is a general response to cichlids.
Hiding is a natural trait that evolved in animals that feel threatened and is useful to avoid predation. And some fish will always hide until they reach a certain size or under certain conditions like too much light or too little cover.
Removing hiding spaces only increases stress and the instinctive need to escape. Fish look for places where they can escape when under threat and now that's the upper corner of the tank. If you want it to not hide, add back cover (plants, rocks and caves), reduce the lighting, keep the tank out of heavy traffic areas, add some less fearful fish, or wait. Or some combination of those.