iPhone game memory leak

Hello to everyone. I have a question and a problem. Keep in mind i am new to Unreal Engine.

I am making game for iOS. On my iPhone 6 is leaking memory, presumably, while on my iPad 4 is working just fine.
When i look at my log on iPhone i see Jetsum events and i think they are there because my game is using too much memory and they are killing my game.
My first level is just menu. Game hud with mainManu widget, and it has few buttons and images, and thats it. I do not have any function. On begin i just call create widget and add it to view port.
And if i let iPhone on that manu it will eventualy crash game. My iPad is working with no problem.

Any suggestion what could it be?