Might be alone on this, but I am seeing slow behavior with my C8 hub using 2.3.5.105.
I applied the update, things seemed ok, but today none of my devices were working, had to reboot the hub and they are now, but there is a noticeable delay in processing of commands sent to the device via hubitat.
Any ideas? I dont have a ton of devices, wave looks great now, way less latency compared to my C& (thank you new antenna's!) Not a bunch of crazy rules either.