Hi @ppt ,
As per our email conversation, it’s not a bug from Bricks.
In your LiteSpeed cache plugin, you should set the cache TTL lesser than 8 hour ideally.
This is because WordPress nonce is only valid for maximum 12 hours. If your page cache is more than that, the expired nonce will be used when using in Load more AJAX calls, then you will encounter the issue.
Reference: Nonces and Cache Lifespan - WP Rocket Knowledge Base
Example of TTL setting
Meanwhile, we already have a TO-DO improvement task to generate new nonce if expired.
Regards,
Jenn