Minimal running example of the bug:
variables:
max_lat: &max_lat 44.14795317094557
min_lat: &min_lat 44.13340676305022
max_lon: &max_lon 12.267570291912632
min_lon: &min_lon 12.235568921311268
city_poi: &city_poi 200
latitude_space: &latitude_space
formula: max_lat - min_lat
longitude_space: &longitude_space
formula: max_lon - min_lon