WPBakery Visual Composer Post Grid is compatible with WP Fastest Cache although it is not compatible with any other cache plugins.
How is Post Grid loaded?
Post Grid table is loaded via Ajax.
The ajax request of Post Grid uses WP Nonce to help protect URLs and forms from certain types of misuse, malicious or otherwise. If Nonce is expired, the result returns zero.
By default, a Nonce has a lifetime of one day so we need to add a cache timeout which deletes cache daily.
If a page is cached, the Nonce value is cached as well. If the cache is not cleared “twice a day”, the Nonce is expired so we need to add a cache timeout rule as below.
Please don’t forget to clear cache manually after adding the cache timeout rule.