Serial number in Server System Title handling

Hello Sir, We are currently using Gurux Director software to test a meter and have observed an issue with how the serial number is displayed in the Security Setup section, specifically below the "Server System Title" box. It appears that the serial number shown is derived only from the last three octets of the Server System Title, instead of the expected five octets. For example, the Server System Title hex stream is: 4B 5A 4B 00 05 0A 2F 7D (This corresponds to "KZK + 84553597")

However, the value displayed in the serial number field is "667517", which seems to be formed using only the last four octets (05 0A 2F 7D). Could you please advise on what needs to be corrected or configured in order to display the correct serial number based on the intended octets in the Server System Title box?