Unusual behavior of elements when resizing the page and mouse controls also do not work

[Grosso2020]

Hi!
I created a container inside which the animation of blocks falling down the container should occur. The code works well, but I noticed that when I menu the window size or open the developer console in the browser, the elements in the container begin to jump chaotically and the mouse block control also stops working.
I created a project in codeopen so that I could visually see the bug.
Link - https://codepen.io/grosso2020/pen/ExqyPeW

cabbage.mp4