Photo explains it all, no blocks surrounding it, just a block on top.
Works as intended.
Any way to fix it to make it look normal like the top?
Only with a mod.
Maybe a mod?
If you put anything on top of a wall (another wall, a block, a torch, etc) it will make the raised portion.
"We live on a placid island of ignorance in the midst of black seas of infinity, and it was not meant that we should voyage far."