Scrolling content
Fixed background
Scrolling content
Fixed background
Before toggle:

(Frame scrolling node
  (scrollable area size 785 600)
  (contents size 785 665)
  (scrollable area parameters 
    (horizontal scroll elasticity 2)
    (vertical scroll elasticity 2)
    (horizontal scrollbar mode 0)
    (vertical scrollbar mode 0)
    (has enabled vertical scrollbar 1))
  (Scrolling on main thread because: Has slow repaint objects)
  (layout viewport at (0,0) size 785x600)
  (min layout viewport origin (0,0))
  (max layout viewport origin (0,65))
  (behavior for fixed 0)
  (children 2
    (Overflow scrolling node
      (scrollable area size 405 305)
      (contents size 410 1020)
      (scrollable area parameters 
        (horizontal scroll elasticity 0)
        (vertical scroll elasticity 0)
        (horizontal scrollbar mode 0)
        (vertical scrollbar mode 0)
        (has enabled horizontal scrollbar 1)
        (has enabled vertical scrollbar 1))
    )
    (Overflow scrolling node
      (scrollable area size 405 305)
      (contents size 410 1020)
      (scrollable area parameters 
        (horizontal scroll elasticity 0)
        (vertical scroll elasticity 0)
        (horizontal scrollbar mode 0)
        (vertical scrollbar mode 0)
        (has enabled horizontal scrollbar 1)
        (has enabled vertical scrollbar 1))
      (Scrolling on main thread because: Has slow repaint objects)
    )
  )
)


After toggle:

(Frame scrolling node
  (scrollable area size 785 600)
  (contents size 785 665)
  (scrollable area parameters 
    (horizontal scroll elasticity 2)
    (vertical scroll elasticity 2)
    (horizontal scrollbar mode 0)
    (vertical scrollbar mode 0)
    (has enabled vertical scrollbar 1))
  (Scrolling on main thread because: Has slow repaint objects)
  (layout viewport at (0,0) size 785x600)
  (min layout viewport origin (0,0))
  (max layout viewport origin (0,65))
  (behavior for fixed 0)
  (children 2
    (Overflow scrolling node
      (scrollable area size 405 305)
      (contents size 410 1020)
      (scrollable area parameters 
        (horizontal scroll elasticity 0)
        (vertical scroll elasticity 0)
        (horizontal scrollbar mode 0)
        (vertical scrollbar mode 0)
        (has enabled horizontal scrollbar 1)
        (has enabled vertical scrollbar 1))
      (Scrolling on main thread because: Has slow repaint objects)
    )
    (Overflow scrolling node
      (scrollable area size 405 305)
      (contents size 410 1020)
      (scrollable area parameters 
        (horizontal scroll elasticity 0)
        (vertical scroll elasticity 0)
        (horizontal scrollbar mode 0)
        (vertical scrollbar mode 0)
        (has enabled horizontal scrollbar 1)
        (has enabled vertical scrollbar 1))
    )
  )
)


After removal:

(Frame scrolling node
  (scrollable area size 785 600)
  (contents size 785 665)
  (scrollable area parameters 
    (horizontal scroll elasticity 2)
    (vertical scroll elasticity 2)
    (horizontal scrollbar mode 0)
    (vertical scrollbar mode 0)
    (has enabled vertical scrollbar 1))
  (layout viewport at (0,0) size 785x600)
  (min layout viewport origin (0,0))
  (max layout viewport origin (0,65))
  (behavior for fixed 0)
  (children 2
    (Overflow scrolling node
      (scrollable area size 405 305)
      (contents size 410 1020)
      (scrollable area parameters 
        (horizontal scroll elasticity 0)
        (vertical scroll elasticity 0)
        (horizontal scrollbar mode 0)
        (vertical scrollbar mode 0)
        (has enabled horizontal scrollbar 1)
        (has enabled vertical scrollbar 1))
    )
    (Overflow scrolling node
      (scrollable area size 405 305)
      (contents size 410 1020)
      (scrollable area parameters 
        (horizontal scroll elasticity 0)
        (vertical scroll elasticity 0)
        (horizontal scrollbar mode 0)
        (vertical scrollbar mode 0)
        (has enabled horizontal scrollbar 1)
        (has enabled vertical scrollbar 1))
    )
  )
)