Rectangular grid in a Multi-zoned grid

When adding a rectangular grid to a multi-zoned grid, even if the option for showing the rectangular grid is selected, the grid does not show on the game board.

Edit: doing this actually negates the rect. grid, i.e. there is no grid for any piece to snap to, visible or not. And you have to do this because you can’t have the M-Z grid and the rect grid on the same level.