Weird lagging at the start

Hi, can someone please explain my issue that I'm having with my android build.
The problem is the lag, everything runs smooth after I restart my first level or advance to the next level of my platformer game.

I have use the profiler to track down the problem, but I can't really find it. Everything looks normal.
I do load an empty scene between levels.

My main question is why would it lag when the level begins and not after a restart of the level or advancing to a new level.

Any advice would be great. Thank you.