Cloudflare has blocked these IPs so they cannot send any callback request to our hosts even we allow in the WFA rule. Anyone suggest how can I resolve this issue?
Cloudflare does not capriciously block anyone’s hostname or IP address. You’re probably seeing instead the result of Cloudflare tools enabled for your domain.
In order to prevent these IPs from being blocked, you need to adjust your settings. Please see this answer to a similar question and adjust your WAF settings accordingly.