Hexagons at resolution 16 appear distant from each other not sharing their borders

[ManuelSpinola]

I am trying to make a grid with specific resolution for the entire world and crop it with a polygon but what I got is the hexagons not sharing their borders (like the South Africa example), they appear separated from each other. How can I make a grid of hexagons of ~ 1km2 área that cover the entire polygon?

dggs <- dgconstruct(res = 16)

cr_grid <- dgshptogrid(dggs, "areas_estrategicas/cr.shp")