I have written a Facebook App (https://apps.facebook.com/giftpick/) but have encountered an issue that I cannot fix. The app works the first time through, but when a user revisits the app after using it once, the iFrame does not load properly (it simply shows a blank white screen). This problem does not occur when going straight to the website. I have written the app in Python using Heroku, so I am looking for someone who is familiar with that environment.
Please respond with a cover letter that includes the following:
1. Your Facebook development experience, including examples of past work
2. Your familiarity with Heroku and python
3. Confirmation that you can replicate the bug and believe you know how to fix it
4. An estimate of how long the work would take