The Builder doesn't apply the changes to the frontend!
If you get this situation:
- Please make sure you didn't edit directly the CMS Page in admin while using the frontend builder
- Please make sure you clicked "Confirm" button to save after changing any on the frontend by the builder
- The Builder uses Magento Cache, so please disable "FPC" item of Magento Cache whilte using the frontend builder then you can enable it again after your site is really live