Litespeed cache not serving different versions of the website as per device

#1
Hi,

We have tried every method including a separate cache for mobile but the problem isn't going away!
We see our website served mobile version on desktop and desktop version served on mobile device.
This doesn't happen on all the pages of the website at once but over a few hours entire website looks broken.

Below is already added to .htaccess file
RewriteCond %{HTTP_USER_AGENT} "iPhone|iPod|BlackBerry|Palm|Mobile|Opera Mini|Fennec|Windows Phone"
RewriteRule .* - [E=Cache-Control:vary=ismobile]

How to solve this?
 
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