Devcontainer Build without cache hangs after mostly successful build

[ontoneio]

So I am running into a weird issue with my devcontainer environment. I am building without the cache inside a Vscode IDE and the image build seems to get to the very last step and then throws this warning and does not ever resolve the build into the devcontainer environment.

 1 warning found (use docker --debug to expand):
 - InvalidDefaultArgInFrom: Default value for ARG $BASE_IMAGE results in empty or invalid base image name (line 2)
[303440 ms] Start: Run: docker events --format {{json .}} --filter event=start
[303442 ms] Start: Starting container

I personally do not have a BASE_IMAGE Argument present in my docker image, so I am not understanding why my build would be failing to propagate due to a variable I don't use?

For debugging sake I even tried adding these lines and still get the error from above...

ARG BASE_IMAGE=mcr.microsoft.com/vscode/devcontainers/base:ubuntu-24.04
FROM ${BASE_IMAGE} AS base

Why would I be getting this error?

[ontoneio]

@samruddhikhandale OR @chrmarti have either of you seen this before?

I have even put this docker check directive in my Dockerfile and it still pauses the build without resolution.

# syntax=docker/dockerfile:1
# check=skip=InvalidDefaultArgInFrom