Yes, I had much pulling-of-hair with this problem of .webp images and caching.
I tried Optimus HQ and really liked it but could not getting it working with WP Rocket. They make you use KeyCDN Cache Enabler, which was 20% slower than WP Rocket for my site on the pingdom score. And Optimus did not work with WP Rocket. So I had to go to WP Rocket + ShortPixel. I wish Optimus supported WP Rocket, it would be a great combination.
EnFi,
I am using WP Rocket with ShortPixel and it is working *very* well.
When i do that:
1) my Pingdom score drops from 75 to 66 due to Cache Enabler not gzipping content
2) it still does not serve .webp.. the page i reference i do a a “page source” and search for “istock” for the banner and it is still a JPG, not a .webp.
Thanks for your help debugging this.
