That's what I thought but apparently something was blocking the restart of Apache after a config change. I tried many configurations that should have restarted it but since I restarted it manually I don't get any error... Let's wait if it works for @Teal_cfr
https://support.plesk.com/hc/en-us/articles/360015533959-A-website-or-webmail-hosted-in-Plesk-periodically-shows-the-Plesk-web-server-default-page-or-old-website-content-
It seems to have solved the problem... I'll keep you posted
Hello,
I have the exact same issue on a subdomain after moving the website from a VPS to another one (same subdomain, same Plesk config, just different IP), the A record points to the correct IP.
I really don't understand where the problem comes from.
It looks like a cache problem but I don't...