[bombcar]

Cloudflare deep down greatly discriminates against shared IPs. If you have a real honest-to-goodness IPv4 address that doesn't change, you'll hardly ever encounter anything.

But if you are behind any sort of carrier-grade NAT or otherwise sharing IPs, you're a second-class netizen, sucks to be you.

[deathanatos]

I'm behind your typical non-CGNAT residential NAT, for v4. (Was v4 only for the longest time, but Verizon just recently rolled out a v6… so we'll see if that changes anything, I guess.)

[bombcar]

If you encounter it relatively often with VPN off, I would do a full scan/check of all devices (including wifi phones, etc) and update all software, as you may have a bot virus or similar. If you DO find one, clean it up and then turn your router off for a few hours or whatever is necessary to get your ISP to give you a new IP, heh.