Front_Facade_A1 cavity issue

When I generate the G-code, there is a cavity behind the bricks. On Prusa Slicer, at 0.1mm layer height, from layer 216 to layer 462, I get an air pocket just behind the surface of the North wall. See these pictures;

 

The same issue happens when I generate the code in Chitubox;

 

 

Resulting print; 

I get the same cavity on model Front_Facade_A2 as well.