Why does docker-compose contact the registry?

I have a docker-compose file like:

version: '3'
services:
  local:
    image: image-that-exists-locally
    volumes:
      - ../:/workarea

I can get it running by typing

docker-compose up

in the terminal.

When I try to create a python interpreter using this docker-compose file, I get the error:

Get https://registry-1.docker.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

Why am I getting this error? Why is pycharm even contacting the registry? The image is stored locally.

I know I'm connecting to the right docker server because I can see my images and containers, including the image I need.