Alexa and ESP32 send commands and see on Alexa App

Hi, i have an ESP32 device and i found a library that interface with Alexa, the library is Fauxmo, sometimes it works well, some times it does not work well. I can send my code and hope you can find the bug and fix it soon or help me to find another solution.
I have to send commands to Alexa and also use the Alexa app
To be sure you read all this requirements , when replay start with "Hi Andrea, ..."
Thanks