@rockstaremperor: there are some big differences in the CSS, weirdest thing being that the 2.2.1 CSS is way larger then the 2.1.2 one.
I’m going to look into that some more, but what would also be helpful is if you could (if only temporarily) go back to 2.2.1 and;
1. deactivate the “speedupper” (the new, faster minifying + aggregating system) by adding this to your child theme’s functions.php (or add it using the code snippets plugin);
add_filter('autoptimize_filter_speedupper','__return_false');
. after that clear cache and surf around to see if this improves anything. you can remove that line afterwards (if you want)
2. switch the CSS minifier back to the previous version by opening wp-content/plugins/autoptimize/autoptimize.php
and on line 202 change
@include(AUTOPTIMIZE_PLUGIN_DIR.'classes/external/php/yui-php-cssmin-2.4.8-p10/cssmin.php');
into
@include(AUTOPTIMIZE_PLUGIN_DIR.'classes/external/php/yui-php-cssmin-2.4.8-4_fgo.php');
again feel free to change back to the previous value if not OK.
frank