After watching my own video I noticed the LED "animation" was still going on meaning I still had a ramp up even after setting all parameters according to the documentation.
I contacted Zooz and got an updated driver which made it work, the "instant on/off" feature is working now but I believe I'm still stuck on a 1 second delay, unless I'm reading this wrong.
Based on the logs it looks to me there is always a one second delay between the time I press the button (or send a "on" command from HE) and the time the switch responds.
If this is the case I don't think there is anything that can be done here (keep in mind in these screenshots ramp was already set to "0" - instant on), am I right?
Turning it on from Hubitat's dashboard.
Turning it on by tapping on the switch