ipad - layout getting distorted with autorotate NO

I am using iPad 9.3 simulator. In app settings, I have Portrait, Landscape Left, Landscape Right.

I have one simple View with three blocks in Portrait layout.

• Block1
• Block2

• Block3

• In my view controller, I have

  -(BOOL)shouldAutorotate
  {
    return NO;
  }
  - (UIInterfaceOrientationMask)supportedInterfaceOrientations
  {
     return UIInterfaceOrientationMaskPortrait;
  }
  

Now

• I press device Home button which takes app to background
• I rotate the simulator to landscape right.

• I re-run application by doing cmd-R

• Now simulator opens up in landscape orientation.

• Status bar is also landscape.
• Width of view is smaller now. There is blank space on LHS.
• But with view rotated right with Portrait layout.
• View is distorted meaning blocks become close to each other. This is also due to as width is smaller now as mention above with LHS point.

If I remove the autorotate code, then simulator opens in Portrait orientation and view is not distorted.

Can you please explain why could this be happening?