Thanks for your fast answer, and sorry for my bad english! There is my codepen example: codepen example
in my project, the double-pined-parent, every time the screen resolution is changed, goes down to its own height, leaving the pinspaser in its place. That is, if I change the resolution 10 times - a double-pined-parent with a height of 1000 pixels will go down by 10,000 pixels. If I completely remove the animation script for one of the blocks, the problem disappears