Hello. The same button. One of them is inside of a frame - another one is outside. Constrains are set to left. When inside of a frame it behaves as if constrains are set ‘right’. Outside of a frame it behaves as intended 
. Why?
In your video, it was hard to tell but it looked like the constraints in your footer were set to “Left and Right” instead of “Left” – could that be the issue causing the different behavior?