HTTPD server handling of Wifi failure

[doge_coder]

Hello,

We have a strange behaviour that we cannot reproduce. During a certain time the (may be days, months...) the httpd of the ESP32 responds correctly to every requests. However in some cases, not identified yet, the server just stops responding. However, the ESP32 stills answers PING request which means the Wi-Fi stack is still up.

How does the httpd server handles a crash of the Wi-Fi stack ? For example a sudden disconnect ? Does it need to be restarted or is it handled directly by the server ?

For information we are still using esp-idf v4.1.1.

Thanks.