Using your example https://www.qwant.com/maps/#map=12.08/48.8642287/2.3391427 open the map a the right location, whoever the marker is no more display to indicate the position on the map
This one seems to work https://www.qwant.com/maps/place/latlon:48.86422:2.33914 but not this one https://www.qwant.com/maps/place/latlon:48.8642287:2.3391427 nor this one https://www.qwant.com/maps/place/latlon:48.864228:2.339142
When puttion less precision on the location it works (2 digits less).
Using your example
https://www.qwant.com/maps/#map=12.08/48.8642287/2.3391427open the map a the right location, whoever the marker is no more display to indicate the position on the mapThis one seems to work
https://www.qwant.com/maps/place/latlon:48.86422:2.33914but not this onehttps://www.qwant.com/maps/place/latlon:48.8642287:2.3391427nor this onehttps://www.qwant.com/maps/place/latlon:48.864228:2.339142When puttion less precision on the location it works (2 digits less).