Hello @generosus,
I tried to recreate the issue in a test site, following the steps from your reply. I was not able to recreate the reported issue even when I set the compression level to 80%. Some images in the test site did not receive additional compression benefits, since they were uploaded with high compression initially to the test site, however, the compression process was able to further reduce the WebP size of the images that allowed additional compression, without affecting their viewing experience. For these, their downloaded size was lower than the size of the same image at 25% compression.
Your issue might be related to some other optimization plugins or optimization options in your theme’s settings, if any, however, without being able to reproduce the issue, we can only speculate on possible causes.
Also Remember to flush the cache of your browser when testing.
If you continue experiencing the issue, post a support ticket through the Help Desk area of SiteGround so that we can check the issue at its occurrence on your site and try to assist you better.
Regards,
Plamen.M
Tech Support Team
SiteGround.com
- This reply was modified 21 minutes ago by .