Very slow response when using Alexa

When I use Alexa to dim/turn on/turn of lights, it can take very long time (5-20 seconds) from Alexa answers “OK” until the command is executed.

Do you know what I can do?

I have:

  • VeraSecure controller
  • 55 pcs. Fibaro Dimmer 2
  • 13 pcs. Multireg Z-Wave thermostats
  • 6 pcs. Fibaro Motion Sensor 2