Why does a white gap appear between backgrounds on tablets and mobile phones?

Question

css

When setting the second background and viewing it on small devices, a white gap appears between the first and second. You can see it on the screen. How to fix
If you need a code, I can throw it off
. Screenshot - https://prnt.sc/gggyun
HTML - https://pastebin.com/cfPqDyJu
CSS - https://pastebin.com/td44yhbh

Answer 1

Need some code :)

Answer 2

Because you have a fixed height in the blocks.