I’m using Chrome Canary (Version 77.0) and it warned me!
[Deprecation] A cookie associated with a cross-site resource at http://cloudflare.com/ was set without the
SameSite attribute. Starting in M77, Chrome will only deliver cookies with cross-site requests if they are set with
SameSite=None. You can review cookies in developer tools under Application>Storage>Cookies and see more details at https://www.chromestatus.com/feature/5088147346030592.
Is this a security error caused by Cloudflare?