Addressing Persistent Bugs Not Resolved by Lovable AI

Why some bugs resist Lovable's AI fix attempts

Lovable's AI agent is excellent at building features but can struggle with certain classes of bugs. The most common pattern is the 'looping problem' — the AI tries to fix a bug, introduces a new one, fixes that, and reintroduces the original bug. This cycle can burn dozens of credits without resolving anything. The AI struggles most with bugs that involve: state timing issues (where the order of operations matters), cross-component data flow (where a bug in one file manifests as a symptom in another), and race conditions (where the result depends on which asynchronous operation finishes first). These bugs require understanding the runtime behavior of the code, which the AI can only infer from static analysis. The solution is to take a manual debugging approach using the browser's DevTools. The Console tab shows JavaScript errors with stack traces that point to the exact line. The Network tab shows API calls with status codes and response bodies. The React DevTools extension (if installed) shows component state and props. Combined, these tools let you pinpoint the root cause before asking the AI for a targeted fix.

• AI looping — the fix for bug A introduces bug B, and the fix for B reintroduces A
• Bug is a timing or race condition — static code analysis cannot detect runtime ordering issues
• Root cause is in a different file than where the symptom appears — the AI fixes the symptom, not the cause
• Bug involves browser-specific behavior — the AI generates code that works in theory but fails in practice
• Multiple interacting bugs — the AI fixes one but the remaining bugs change the behavior, confusing the next fix attempt

Error messages you might see

Before you start

• A Lovable project with a bug that the AI has failed to resolve after 2-3 attempts
• Access to browser DevTools (right-click the preview and select Inspect)
• Willingness to read error messages and trace code logic (no coding experience required, just patience)

How to fix it

function BrokenComponent() {
  const { data } = useQuery(...);
  const processed = data.items.map(transform); // potential crash
  return (
    <div>
      {processed.map(item => <Card key={item.id}>{item.name}</Card>)}
    </div>
  );
}

function BrokenComponent() {
  const { data, isLoading, error } = useQuery(...);
  // Debug: log what we actually have
  console.log("Query data:", data, "Loading:", isLoading, "Error:", error);
  if (isLoading) return <p>Loading...</p>;
  if (error) return <p>Error: {error.message}</p>;
  if (!data?.items) return <p>No items found.</p>;
  const processed = data.items.map(transform);
  return (
    <div>
      {processed.map(item => <Card key={item.id}>{item.name}</Card>)}
    </div>
  );
}

Complete code example

1import { Component, ErrorInfo, ReactNode } from "react";
2
3interface Props {
4  children: ReactNode;
5  fallback?: ReactNode;
6}
7
8interface State {
9  hasError: boolean;
10  error: Error | null;
11}
12
13export class ErrorBoundary extends Component<Props, State> {
14  constructor(props: Props) {
15    super(props);
16    this.state = { hasError: false, error: null };
17  }
18
19  static getDerivedStateFromError(error: Error): State {
20    return { hasError: true, error };
21  }
22
23  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
24    // Log error details for debugging
25    console.error("ErrorBoundary caught:", error.message);
26    console.error("Component stack:", errorInfo.componentStack);
27  }
28
29  render() {
30    if (this.state.hasError) {
31      return this.props.fallback || (
32        <div className="p-8 text-center">
33          <h2 className="text-lg font-semibold mb-2">Something went wrong</h2>
34          <p className="text-muted-foreground mb-4">
35            {this.state.error?.message || "An unexpected error occurred."}
36          </p>
37          <button
38            onClick={() => this.setState({ hasError: false, error: null })}
39            className="px-4 py-2 bg-primary text-primary-foreground rounded-md"
40          >
41            Try again
42          </button>
43        </div>
44      );
45    }
46
47    return this.props.children;
48  }
49}

Best practices to prevent this

• Stop prompting after 2-3 failed AI attempts — continued prompting usually makes the problem worse
• Always revert to the last working version before attempting manual debugging — a clean codebase is easier to debug
• Check the Console first — 90% of bugs have a clear error message that points to the root cause
• Add console.log statements to trace data flow through your components — log what you expect vs what you actually get
• Use an ErrorBoundary component to catch crashes gracefully instead of showing blank screens
• When giving the AI a fix prompt, include the exact error message, file name, and line number from DevTools
• Add loading and null checks to every component that uses async data — most runtime errors are 'undefined' access on data not yet loaded

Still stuck?

Copy one of these prompts to get a personalized, step-by-step explanation.

Related error patterns