Hello,

For the preview changes I have logged into your website and checked by activating the default wordpress theme and it behaves the same with it which clears that the issue is not with our theme.

You can try asking the Wp-Bakery support for help regarding this.

And for the front-end editor not working I did not do anything on the website. I just cleared the WP Rocket cache and checked and it was working.

Regards.
Xtemos Studios.