Hi,
This is probably not the best place to ask this question. The purpose of notes is to assist mappers to improve the map data. Your question is about how the data is rendered. For example you could try asking on the "Rendering Maps" forum at https://forum.openstreetmap.org/viewforum.php?id=100. If you do that, I would suggest being more specific, e.g. rather than "some scales" and "other cities", say which zoom level (e.g. zoom level 5 or 7 or 9..) and which other cities. Also say which of the many maps produced from OpenStreetMap data you are referring to, as each one may have a different approach to city labels. You are probably referring to the "standard" layer, rather than for example the Cycling or Public Transport maps.
