Slow communication, Zwave Nano Switch Aeotec

I have problem with a Switch nano from Aeotec.
Communication is slow.
I did some tests in parallel with a shelly .
Pressing them together, Shelly is immediate, Aeotec takes 2 to 4 seconds to be logged in by HE.
What can I do?
I use the switch as a remote switch, there is nothing connected to the output.