Permission Issues when using AppConfig Agent Write To in ECS Volumes

Howdy, I'm trying to use the new support for AppConfig Agent Write to in order to automatically write out and update config files on disk in ECS. I'm doing this by using the AppConfig agent as a non-essential container writing to a shared volume. However I'm running into an issue that AppConfig Agent in docker runs as Root by default and later containers can't seem to actually read the configs due to permission issues (errno 13). Looking to see if there's a way around this.