Yes, I have the same. Before upgrading to WP 4.6 differences on pages for ‘normal’ adn mobile viewing worked ok. After the the update, it seems WP Supercache prefers to cache the ‘normal’ page version and overwrites the mobile one.
Example : In the page source there is a check using wp_is_mobile to add some javescript to change the image size on mobile devices. This worked fine before, but now it seems that once the page is loaded on a ‘normal’ device, the mobile devices are getting the cached ‘normal’ version.
Anyone knows what the problem is, or how to resolve ?
Update on this subject :
problem is solved. The used theme had was using ‘&$var’ in its core.php.
After removing the ‘&’ everuthing worked ok again. Now running on PHP7.