Weird Layer separation Problem

Hello, lately ive been having this weird problem that has me pretty confused on what to do. Whenever i print a hollow square shape with the right dimension it leave a gap right in the middle of the wall almost all the way trough. Ive attached 2 picture to show what i mean, can anyone enlighten me on what the heck is happening there? Thanks in advance. I am using a cr10s pro if that can be of any help.

it's down to the infill settings in the slicer.
You need 'gap fill' switched on.

No idea if cura has gap fill - but it ought to :-)

Im using the creality slicer and after reading your reply ive found a parameter called infill overlap % im guessing thats gonna fix my problem, thanks for the reply.