Couple of suggestions.
You should definitely get the z-wave firmware updated. I believe that is showing you have firmware 7.14 and gateway 7.18. You want both to be 7.18 on the C7
I would test with a standalone USB-A power block if that is feasible. Also be sure the PoE is disabled on the port the hub is connected to.
Which HA integration are you using? The one that shares Hubitat devices to HA via Maker API I assume?
Are all 25 device Z-wave?
What is app 97 in logs that is making a lot of debug logs?
What is device 133 that looks to be connecting to the websocket?
