Pycharm remote debugger is stuck on waiting for connection when running from Pycharm `Cloud Code: Kubernetes` run configuration

Question

I'm trying to run in debug mode, a Python FastAPI application running in a container using PyCharm's Cloud Code plugin, but I can't get breakpoints to work.

Setup:

• PyCharm with Cloud Code plugin
• Python 3.11 FastAPI application using base docker image from tiangolo/uvicorn-gunicorn-fastapi:python3.11
• docker-desktop local deployment via Cloud Code: Kubernetes run configuration

What happens:

1. The container deploys successfully
2. Port forwarding works (both for app and debug ports)
3. The application runs normally
4. Breakpoints are never hit - I see a background task on debugger which says "waiting for connection"

Logs show this warning (not sure if relevant):

[elon] WARN[0000] not a python launcher: unable to determine python version from "/usr/bin/env": exit status 125

From container inspection:

$ kubectl exec -it pod-name -- ps -ef
root         1     0  0 13:39 pts/0    00:00:00 /dbg/python/launcher --mode pydevd --port 5678 -- /start-reload.sh
root        13     1  0 13:39 pts/0    00:00:01 /usr/local/bin/python3.11 /usr/local/bin/uvicorn --reload --host 0.0.0.0 --port 8080 --log-level info app.web:app

The container can successfully reach my host machine:

kubectl exec -it pod-name -- wget -O- http://host.docker.internal:63341
HTTP request sent, awaiting response... 404 Not Found

Port forwarding is active

Port forwarding pod/pod-name in namespace default, remote port 5678 -> http://127.0.0.1:5678

Environment details:

• PyCharm Professional 2024.3.2
• Cloud Code plugin version 24.11.1-233-api-version-223
• macOS Sequoia 15.3.1
• Docker Desktop version 4.38.0 (181591)