Make sure you don't mix Geocoder and Geolocator.
Disable or uninstall the Geolocator as both can conflict if not set correctly.
Both set coordinates in the cb_geolat and cb_geolng columns of the #__comporfiler database table.
Enabling the debug mode should show something like this in the front end (at least)
Google: OK street_address 10 Rue Camille Desmoulins, 59290 Wasquehal, France 10 10 street_number Rue Camille Desmoulins Rue Camille Desmoulins route Wasquehal Wasquehal locality political Nord Nord administrative_area_level_2 political Nord-Pas-de-Calais Picardie Nord-Pas-de-Calais Picardie administrative_area_level_1 political France FR country political 59290 59290 postal_code 50.6862364 3.1388212 ROOFTOP 50.6848874 3.1374722 50.6875854 3.1401702 ChIJG_16Bg8pw0cRMSNCS89tVv8 : Google URL
With a link to the google url result
maps.googleapis.com/maps/api/geocode/xml...hal%2C59290%2CFrance
Summerizing , received address and processed geocoding and coordinates (50.6862364 , 3.1388212)