docker-compose doesn't see contents of a particular directory

I've got a docker-compose.yml file that mounts the current directory as a volume to /app in a container. The .yml looks something like this:

version: "3"
services:
  app:
    build:
      context: .
      dockerfile: docker/Dockerfile-commandbox
    volumes:
      - .:/app
    ports:
      - "8080:8080"
    environment:
      - TZ=${TIMEZONE-America/Los_Angeles}

Pretty basic.

Now, when I ssh into that container and navigate to the /app directory, it can see the ./wwwroot folder, but its contents are empty, despite not being empty on my host machine. Performing a directory listing on the wwwroot folder in the container displays no results; whereas the folder has lots of content.

What would be causing the container to not be able to see the contents of the wwwroot folder?

The Dockerfile-commandbox file is pretty straightforward as well.

FROM ortussolutions/commandbox:4.8.0
RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y \
    net-tools \
    tzdata \
    vim \
 && rm -rf /var/lib/apt/lists/*
COPY scheduled/scheduled-tasks.cfm /app/
WORKDIR /app
RUN box server start cfengine=lucee@5.3.7.47 port=8080 serverHomeDirectory=/root/serverHome host=0.0.0.0 openbrowser=false saveSettings=false heapSize=4096 minHeapSize=4096 \
    && box config set server.defaults.app.cfengine=lucee@5.3.7.47 server.defaults.web.AJP.enable=true \
    && curl -sS http://localhost:8080/scheduled-tasks.cfm \
    && box server stop

UPDATE To be clear, there are other files in the directory structure and each one is visible, with its contents, from the container.