Has anyone heard this sound in CX5 Turbo? (I found a video that successfully recorded the sound I couldn't record)

Looks like few people wen through some efforts to get the dealer to fix the issue - post # 14 with potential remedy of removing fuel line bracket, installed insulation between high pressure fuel line and firewall - based on post #27
https://www.mazdaforum.com/forum/maz...-cx-5-a-43725/

I am taking the car to the dealer with hopes that they recognize the issue and have will to fix it.
In case they call it "normal" and turn me away, does anyone know DIY way of adding insulation between firewall and the fuel line bracket?

Thanks!