Strange build error, but build succeeded

I built a release version of an app using eas build. I was watching the build logs and then switched away briefly, around the time the “Welcome to React Native!” message is printed. When I switched back I saw the following:

Then I checked my terminal and found the following:

% eas build --platform android
✔ Linked to project @wodin/bodyparts
✔ Using remote Android credentials (Expo server)
✔ Using Keystore from configuration: Build Credentials 1O8gyElrlh (default)
✔ Uploaded to EAS 8s

Build details:

Waiting for build to complete. You can press Ctrl+C to exit.
⠇ Build in progress...    Error: Got unexpected null

I tried loading the build page again, and it showed that the build had actually succeeded:

Hm, weird error- but the build artifact is still downloadable?

Yes, everything succeeded. I could download the artifact. I wonder if I didn’t have a brief network outage between me and the Expo servers that I didn’t otherwise notice.