In configuration file, SocketAcceptPort property is inherited from the other session, not from "DEFAULT"

According to documentation, any [SESSION] section of the configuration file will inherit all properties from the [DEFAULT] section.
However, I noticed that this is not true for, at least, SocketAcceptPort property.
Let say, I define a few acceptor sessions, and I skip SocketAcceptPort in one of them. Then it takes it not from DEFAULT section, but rather from the other session definition that has the same SenderCompID .
It probably makes sense as a feature (though I am not 100% sure), but in the documentation I could not find the explanation of this behavior.