I am making a 2D mobile game and it runs really well (60 fps) on my phone. However, in some cases the performance goes down drastically to the point where it runs at 20 fps or even less. It happens at random times so I can't pinpoint what is causing this. During the performance decrease Gfx.WaitForPresent appears in my profiler which eats a lot of power. I am aware that this might be because of Vsync being turned on, but I have it disabled, along with shadows, AA and everything else that absolutely kills mobile performance. What else can be the problem? My game relies heavily on good performance for gameplay so this needs to be resolved ASAP.
Edit: I also noticed that the GPU stays at 0 ms which is really odd as well.