I have a problem with my 2 Aucuba plants. They are in the same large pot. One is thriving and the other's leaves are drooping. The pot is under the front porch roof. It gets sun in late afternoon for a short time. Could it be an air pocket?
Check your watering and make sure your watering the pot evenly.
Tamp down the soil if you think it could be air pockets.
Here is a link to refresh you on the care requirements.