My App is being reported as maulicius

My Apk Url

I work for a company that develops a CAMERA app,
But since this weekend, we are receiving reports from our users that AVG is reporting our app as malicious(Android:Joker-BG [Trj]User-added image). I reported a false positive on the site and from my smartphone.

I want to know why the app that I develop falls in the backlist? And how can I communicate faster to AVG to fix possible errors in my app without knowing by my users?