game stop working after game loading finish on android

Game working fine in editor and after building and install it on android phone , the game work fine till the loading finish then it just exit the game screen. The first index 0 is just an empty preLoader scene with a loading bar and the next scene is the main menu scene with 3 canvases and a lot of UI , tried decreasing the size of most of the textures in the assets and it was not helpful at all. Tried checking the profiler for memory usage and after optimizing it went from 20 mb to 4 mb but the game still crashes.