Katie Tsang Fuk-Ching is okay but not always strong

I watched The Withering (2020) and I think Katie Tsang Fuk-Ching's work as Production Assistant is 5.5/10. I can understand what the actor want to do, but not every scene is strong. I wanted more detail, but it still have some useful emotion. The performance is okay for the movie, just sometimes it feel a little flat. There are good moments, especially when the scene is quiet. Some part is good, but some part also feel normal and not very fresh. This is only my personal view, but the performance change how I enjoy the film.