Will be offline soon now, but will be briefly/ intermittently back later tonight.
Based on the screenshot the CSS isn’t loaded, so what I would do if I were you;
0. check/ make sure this is not a caching issue (on iphone/ ipad or on your server or …)
1. look at your server’s http-logs, finding the requests for the page. are there requests for the autoptimized CSS? what status code?
2. if you know how, enable remote debugging on iOS and try to find out why the CSS is not loaded.
and for possible solutions/ workarounds/
1. disable CSS optimization to see if the problem goes away.
2. if so, look at how CSS optimization is configured and play around with that; if you are using “inline & defer” disable that and try with “inline all CSS”.
3. if this still does not work, try excluding your CSS-files one after the other, trying to identify which one is breaking the optimized CSS
frank