LWRP and Postprocessing

Hello, i used HDRP and now switched to LWRP, however, when i start the game the gameobject where postprocessing is gets disabled automatically. Any idea what causes this or how i can fix it? If i start the scene from the game, and the postprocessing gets disabled it lags horribly, dropping to 7-10 fps until i pause the editor and re-enable the postprocessing.