Can't place canteen on map if address was not found

[chk1]

I created a canteen and entered an address like I did a few times, but with one particular address I received a fully grey map, I was not able to place a marker. There were no map tiles and no marker to move around, I was not able to zoom or pan the map.

The address in question belongs to "Bistro Frieden" :
Scharnhorststraße 100, 48151 Münster, Germany

I suspect this is because the geocoder can not find the address, OSM's nominatim does not find it either.

I managed to find a workaround by filling the coordinate fields with the Firefox devtools (fields are readonly)