Hello, I have planted two of these Red Twig Dogwood shrubs. I’m completely new to growing these. For the past few weeks, they have been experiencing leaf yellowing and dropping, all the while it has been growing in length and new green leaves. My nursery I bought it from attributed the yellowing to parts of the plant being exposed to more sunlight than other parts. I know something is finding it tasty (maybe June beetles?) but I’m concerned about the continued yellowing and even brown spots. Is it just sun or something else? It’s located on the north side of my fence and gets a good amount of direct light but not full sun all day. Thank you very much!