Why is the first corner of every layer always like this

Can anyone offer any advice on why the first corner of every layer is like this ?

Rubiks Cube Solution, PDF, Teaching Mathematics

scx2.b-cdn.net/gfx/news/2015/whataretheea.jpg

First layer corner issue. : r/klippers

Rubik's cube solving process by championscubestore - Issuu

3D Print Warping: PLA, PETG, ABS – 3 Easy Fixes

Prime tower first layer issue - Snapmaker J1 - Snapmaker: where

How to use layers in Illustrator

3D Printing Troubleshooting: All Problems & Solutions

scx1.b-cdn.net/csz/news/800a/2015/whataretheea.png