Image: WebP, compression, scaling, regeneration and more module- problem with correct setting

[Maxflor]

Hello, please, does anyone here have experience with this module and its correct setting? It will come mki that is causing me problems on the site.
Sometimes the page is normally fast and other times it seems to cycle... I don't know how to deal with it and I don't know if I have the correct settings on the module.
After conversion to webP, should I delete the original images and the like in the module. I did not find it in the documentation... I will be very grateful for advice if anyone has experience with this.
Thank you.

The module is on prestashop 1.7.8.7 and I am attaching a link to the website if it helps.
www.maxflor.sk