How to write a fixed block position on iOs?

Question

css

While setting up the adaptability of the site, we encountered the problem of incorrect display of fixed blocks on devices with iOs. The problem is that if a block with a fixed position (fixed to the entire window) is in a block with overflow: scroll or hidden, then the fixed block is cut off, and only the remainder of the block that is externally within the overflow block is displayed. On devices with other operating systems, everything is displayed correctly.

Answer 1

Well, take out the fic block from the scroll block.