Docker Only Half-Restores Network When Bridge Assigned to Firewalld Zone

What this error means

FIXME error in API — Docker only half-restores network interface if bridge is assigned to a different firewalld zone than original is a Docker failure pattern reported for developers trying to fix docker networking half-repair when bridge interfaces move between firewalld zones on linux, causing partial connectivity loss. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

Open GitHub issue #52642 on moby/moby (opened May 17, 2026 by sandnabba). Networking regression where Docker fails to fully restore bridge connectivity after firewall zone transitions. Area: networking/firewalld, version 29.4+. Has 3 active comments indicating ongoing investigation. Significant for enterprises using dynamic firewall policies with Docker-managed containers.

Common causes

• Open GitHub issue #52642 on moby/moby (opened May 17, 2026 by sandnabba). Networking regression where Docker fails to fully restore bridge connectivity after firewall zone transitions. Area: networking/firewalld, version 29.4+. Has 3 active comments indicating ongoing investigation. Significant for enterprises using dynamic firewall policies with Docker-managed containers.

Quick fixes

1. Confirm the exact error signature matches FIXME error in API — Docker only half-restores network interface if bridge is assigned to a different firewalld zone than original.
2. Check the Docker account, local tool state, and provider configuration involved in the failing workflow.
3. Compare the failing environment with a known working setup, then change one configuration value at a time.

Platform/tool-specific checks

• Verify the command, editor, extension, or API client that produced the error.
• Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
• Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

1. Capture the exact error message and the command, editor action, or request that triggered it.
2. Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
3. Review the source evidence below and compare it with your environment.
4. Apply one change at a time and rerun the smallest failing action.
5. Keep the working fix documented for the team or deployment environment.

How to prevent it

• Keep provider/tool configuration documented.
• Record non-secret diagnostics such as tool version, provider name, model name, and command path.
• Add a lightweight check before CI or production workflows depend on the tool.

Sources checked

• https://github.com/moby/moby/issues/52642

Evidence note: Open GitHub issue #52642 on moby/moby (opened May 17, 2026 by sandnabba). Networking regression where Docker fails to fully restore bridge connectivity after firewall zone transitions. Area: networking/firewalld, version 29.4+. Has 3 active comments indicating ongoing investigation. Significant for enterprises using dynamic firewall policies with Docker-managed containers.

Related errors

• Docker

FAQ

What should I check first?

Start with the exact FIXME error in API — Docker only half-restores network interface if bridge is assigned to a different firewalld zone than original text and the smallest action that reproduces it.

Can I ignore this error?

No. Treat it as a failed Docker workflow until the root cause is understood.

Is this guaranteed to have one fix?

No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.

How do I know the fix worked?

Rerun the same command, editor action, or request. The fix is working when that action completes without FIXME error in API — Docker only half-restores network interface if bridge is assigned to a different firewalld zone than original.