I have a Magnolia Daybreak planted in full sun but close to some big cedars; planted in 2015, and it has never done well, giving only 2-5 blooms each year. This year it had 3 and they were coming along but something seems to have eaten them overnight, and is also chewing off the leaf buds. As well, the bark is badly split at the bottom. I poked around under the bark and found only an earwig. I dug around gently in the soil around the base for some kind of fat grub but didn’t find any. See photos. Any thoughts? Thank you.