Frame rate drops when replaying level

Hi all,

I having some issues with my game. Its a simple 3rd person game on the Ouya platform, Left axis moves player and right axis orbits the camera.

So far I have built 3 levels. Now if I load the game from start and play from the beginning - Lv1 - Lv2 - Lv3, then the game performs very well. Frame rate is 55fps to 65fps every time. if I quit and load the game again, then using the level select menu and jump to Lv3, the level again plays smoothly. 55fps to 65fps.

Once I've completed Lv3 and jump back to ether Lv1 or Lv2, the game still performs as it should. My problem is that every time I jump back to replay Lv3 the frame rate drops to 15fps to 45fps depending where I look using my orbit cam. If I'm looking ahead and try to progress its drops to 15fps. If I orbit the cam so it right above my head then it goes back to 60fps.

Im having a had time trying to understand what is going on as I know Lv3 plays with out a problem the first time round. Lv1 and Lv2 play perfectly every time even with continuos replays.

Can anyone suggest any advice or where i should be looking in order to fix this problem.

Thanks in advance