Skybox bars at the side of the screen when hitting the play button

i have the backround of my 2d game fit perfectly into the main camera view, but somehow when i hit play, even tough in the game view its fine, 2 bars with the color of the skybox appear signaling that the camera now has a larger field of view??

Do you have any scripts that alter the camera’s size? Watch the camera’s size(aka, zoom) in the inspector and hit play, see if it changes.