As discussed at
- Why are my suggested edits here approved by Community♦?Why are my suggested edits here approved by Community♦?
- Does the community user auto-approve some suggested edits on beta sites?Does the community user auto-approve some suggested edits on beta sites?
...this is because the Community User was marked as the editor for an "improved" suggested edit, when the improve window was open but nothing was actually changed.
Or, while that may not have been exactly what happened here, since some of those bugs have been squashedsome of those bugs have been squashed, it at least is somehow associating the Community user with the suggested edit instead of the user who actually made the edit.