Hi, Ivan! 
Thank you for your help. The thing is that's the same entity. In official cadastre data, it has the boarders of a suburb here https://www.openstreetmap.org/relation/16084742, but in another official doc (see source tag) here https://www.openstreetmap.org/relation/16568216/ it was merged with Airport and has much wider borders. Up until officials make up their mind, this kind of confusion would persist.