Greetings,
I am interested in your project posting. From your problem description, I believe that it is because of threading issue with your app (e.g. unused or improperly used of threading).
I have a team of programmers so that I can assign a dedicated person to work on your project full time.
For background, I have been helping around 100 customers worldwide build their websites and software products over the past 4 years, and 99% of them were really happy with my service. Is that something you might be interested in?
Thank you,
Nam