my gt metrix Grade A went to B and my lcp went from 889 to 1.7

Hi Guillaume,

I have moved this thread to the correct section for you.

I completely understand your frustration. As we discussed via email, I have already processed your full refund, and you should see it in your account shortly.

Since disabling the plugin didn't immediately revert your metrics, it is highly likely that a server-level cache or CDN was holding onto the optimized files. If you ever want to troubleshoot this in the future, my door is always open.

Thank you for giving JR Image Optimizer a try, and I wish you the best with your site!