Fix FlyingPress Load Glitch

Since enabling FlyingPress and its companion FlyingCDN on my WordPress site, overall performance scores look great, yet every visit now starts with an odd flash: a blank background shows only the menu for a moment before the hero image finally appears.

FlyingPress support suspects a Cloudflare security rule is blocking their crawler and possibly delaying real visitors as well. They pointed me to Ray ID 9dd023c13148f847 and suggested checking Security → Events to see which rule is tripping. I haven’t touched any of my Cloudflare or server-side security settings recently, and all three optimisation modules in the plugin—JavaScript, CSS and Image—are currently active.

I need someone who can:
• trace the exact cause of this render delay (whether it’s Cloudflare, a FlyingPress configuration, or something else)
• explain the findings in plain language so I understand what went wrong
• implement or guide me through the fix—adjusting the rule, tweaking plugin settings, or any other step that eliminates the flash without sacrificing the speed gains

You should be comfortable working inside WordPress, Cloudflare, and performance tools like Lighthouse, DevTools network waterfall, etc. Please outline how you’ll approach the diagnosis and the estimated turnaround.