I have a TL-SG1016DE Ver 3 with the latest firmware. It keeps dropping connectivity to cabled clients that turn off. The clients get the 169 default address. The only way to clear it is to drop the power and repower the switch. Have never had this happen on any other 1016's I have had. Switch power is connected to a Tripp-Lite rack mount UPS. Using the management tool to reboot doesn't clear it. Switch is connected to a Netgear which is connected to an Xfinity Xfi router.  Clients that are on 24/7 keep their addresses. Only machines that turn off cannot get back on. There are all connected by Cat 8 Ethernet cables which I have switched out. Also, machines on the same network disappear from Windows 10 network. Wi-Fi from the Xfi always works so the problem lies in either the TP switch or the Netgear but clients I connect to the netgear do not have that problem and bouncing the Netgear doesn't clear it. Any suggestions?