FAQ | Does your Q-SYS core bounce between being seen and not seen on your network?
Understand why your Q-SYS Core might be intermittently visible on your network.
Answer
It is very likely that you have hard links set up, and it is causing this symptom. Hard links are to be used when Q-SYS devices cannot be discovered via QDP (multicast not allowed or on a different physical network).
If QSD can discover via QDP AND there's a hard link to the same device, it's refreshed constantly in Q-SYS configurator, causing the problem.