It’s not ok, the positioning is done through js, using relative positioning.
We would like to have it sticky as mentioned in the interface (CSS implementation preferred).
I am sharing the details via a link.
https://gyazo.com/39666290fe5091a56f722bc053e9ad62
– My website (look for errors at the endpoint while scrolling through trackpad or mouse, not scrolling.) (Upon inspecting the left column is relative to the middle section, hence the top changes)
https://gyazo.com/19da51a74e20012530221dd07c802f1e
– Amazon (Positioning is sticky, implemented via css)