Rocket-loader.min.js error on lighthouse tool

Hi,

I use Chrome -< inspect - lighthouse tool to check my website’s status.
I got low score due to rocket-loader.
I don’t use minification tool except’t cloudflare.
How to solve this?

Registers an unload listener
The unload event does not fire reliably and listening for it can prevent browser optimizations like the Back-Forward Cache. Consider using the pagehide or visibilitychange events instead. Learn More
URL
rocket-loader.min.js:1

https://ajax.cloudflare.com/cdn-cgi/scripts/7089c43e/cloudflare-static/rocket-loader.min.js

Any update from anyone on this? I am having the same issue.

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