Fps drops after screen resizing

[MrBzik]

Hi. I am implementing scroll-timeline animations on several elements.
When I am zooming in - out on browser window (on zooming its more flaky), or I resize it by dragging window borders, fps drops dramatically.
Not sure if it is normal.

For demonstration, here is the page, with one of the cool parallax codepen works I was trying to recreate with the library
https://codepen.io/Serrrga-Kk/pen/GReXygj