After having the USG 3P overheating. I decided to add some auxiliary cooling to the case. See photos for details.
It was locking up with any combination or single instance of DPI, IPS or IDS. As soon as the little guy had any tax on its processor, it would freeze and not boot up properly until it cooled. It was always wall mounted with no obstruction to the vents. I didn't want to purchase another of the same unit and I don't mind putting in the effort to keep this one alive for a while longer. I am a fan of this company's tech. There are 4 UniFi AP-AC-Pros and an 8 Port Unifi Switch on this network, so I am pretty invested in this platform.