On mobile, the CDN, Cloudflare seems to present the prompt several times a day. Is the current setting too aggressive? Can it be stepped down?

We would need to investigate why you are getting the message in the first place. If you can give me the ray ID it shows on the page at the time, I can then use that to take a look

 

give me the ray ID it shows on the page at the time

Not sure what this is referring to but I am assuming it shows on the page shown. I will try to capture it when it happens and get back here.

At the bottom of the page when you see the cloudflare page, it usually says rayid on the bottom left