syslog integration and identification missing

[victorandrehc]

Hello,
I am using spdlog to implement a logger via syslog. I have noticed that the identification of the name of my process (opcuad) object is missing after some entries. The identification starts there
May 27 17:20:58 AAC9D96E38F1 user.debug opcuad[939]: <rest of the message>.
but it soon disappears
May 27 17:21:01 AAC9D96E38F1 user.debug[939]: <rest of the message>
The value of the variable containing the identification is there since it is extracted from argv[0] and the sink pointer is the same throughout the code. The PID also stays the same so spdlog/syslog "knows" which process the log entry is coming from. Can someone there help me debug this?
I am using Barebox's syslog btw