This is a different issue than the one you posted about where you said that movement stopped and you didnt switch back into combat stance. Also this interaction is the same on PC and other platforms. You are just to close to the wall to edit the structure you are aiming for. It also looks like you are using the ADS button as a crosshair. This is not showing you the correct area you are editing on. Changing this back to a normal crosshair might help when editing.