Arduino Nano Web Server & Ajax (not quite) working

Projects Networking, Protocols, and Devices
3

@kenb4, from your post it seems that there are no errors in the code?

Here is what it says in the serial monitor:

GET /ajax_switch&nocache=6340.785373073477 HTTP/1.1
Host: 192.168.1.71:6501
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Accept: */*
Referer: http://192.168.1.71:6501/
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9,it;q=0.8,hr;q=0.7

And this when I click refresh on the webpage:

GET / HTTP/1.1
Host: 192.168.1.71:6501
Connection: keep-alive
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Accept-Encoding: gzip, dGET /ajax_switch&nocache=751677.66259914 HTTP/1.1
Host: 192.168.1.71:6501
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Accept: */*
Referer: http://192.168.1.71:6501/
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9,it;q=0.8,hr;q=0.7

GET /favicon.ico HTTP/1.1
Host: 192.168.1.71:6501
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Accept: image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8
Referer: http://192.168.1.71:6501/
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9,it;q=0.8,hr;q=0.7

I see two GET requests after page refresh. Could this be part of the problem?