Problem Alexa-HA after modem changed

I’ve change my old router with a new Fritz-box. I’ve set same SSID name, password wifi, static IP for devices, routing… as old config in the old router.
HA work great via web inteface, but now Alexa app doesn’t recognized my deviced exposed with HAASKA (for example a shelly1 switch, I can control via webinterface, but Alexa doesn’t find that by voice). Devices (scripts, routines, … from HA ) not responds. I tried to re-enable haaska skill with no success… what can be the problem?