Problem coming up with a hostname

[Ivanov305]

Hello.
I have a problem with some servers I am adding them to my tracker. Not all show the name, map and players in the server . I tried by adding a query port for a moment it showed the full information, but after a while the information disappeared again.
It only does it with cs 1.6
I don't have this problem with other games.
Where can this problem come from?

[Kurounin]

The issue seems to be from src/GameQ/Protocols/Source.php. Removing the %s from:

        self::PACKET_DETAILS   => "\xFF\xFF\xFF\xFFTSource Engine Query\x00%s",

changing it into

        self::PACKET_DETAILS   => "\xFF\xFF\xFF\xFFTSource Engine Query\x00",

seems to solve this issue, but I don't know how it might affect other source games.