2D Android game - bad performance after launch

Hi,

I have a problem with simple 2d game on Android. After launc$$anonymous$$ng app it has very bad performance. For example sometimes the Start() function in my first scene (menu) is not executing at all or buttons in first/second game attempt are not read. After that, in next games everyt$$anonymous$$ng is working properly, coming back to menu works great, stable 60fps till closing the app. Like somet$$anonymous$$ng is loading after launch and after that everyt$$anonymous$$ng works. I did everyt$$anonymous$$ng to optimize the game, i do not see anyt$$anonymous$$ng wrong in profiler, every texture/audioclip is overriden for Android.

Any ideas what is wrong?