I use 3/8" Baltic Birch plywood as backers and this eliminates this problem. We have had framing projects with thin backers and used d-hangers attached with E6000 glue.
I agree with most. I use Baltic Birch plywood purchased from Ocooch Hardwoods. As mentioned, BB plywood has more layers fo example, 1/4" has 5 layers and no voids.