Nope adsense works fine with cloudflare
Ps. If anyone is using cloudflare and wants to ban any country add this code to the header section
<?php
if($_SERVER["HTTP_CF_IPCOUNTRY"] == "countryid" OR $_SERVER["HTTP_CF_IPCOUNTRY"] == "countryid") {
exit("Harder to recover from.");
}
?>
for
countryid change it to RU for russia