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Diagnose a FlutterFlow custom widget that fails in the app but not preview

Project brief

Need help with one FlutterFlow custom widget. It behaves correctly in preview but has a problem in the app.

Review the code, explain the root cause and recommend a focused fix. This is a small diagnostic assignment, not a new feature or an app rebuild. Please describe similar FlutterFlow widget troubleshooting you've done. Authorized code, the failing environment and reproduction steps will be agreed before work starts.

Deliverables & acceptance

What you'll deliver

  • Root-cause explanation and recommended fix for the agreed widget issue.

What the result must meet

  • The diagnosis explains the app-versus-preview difference with reproducible evidence and a specific recommended correction.
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