I don’t think that’s related, as those other users would be going through a different datacenter closer to them.
If I were to guess, something at your end is seeing a ton of traffic through UK/Italy/Norwegian Cloudflare IP addresses from the IP Ranges list, then rate limits them. Those visitors stop coming around, then the rate limit resets.
I’m sure the 522 tip here says to make sure you’ve Allow-listed those IP addresses.