I refer to the crossing the note is attached to: 
https://osm.org/node/7640199589

Altough now, looking at mapillary pics, I see that there is a flashing warning light for vehicles on the service road:
https://www.mapillary.com/app/?pKey=514630996867376
Does it count as crossing=traffic_signals? Judging by the StreetComplete questions, it shouldn't (there is no signal for pedestrians/cyclists).