Hello,
Sorry to hear about the inconvenience.
If you are using the SiteGround Optimizer plugin on your Site and facing the issue related to changes not showing then it is a third party Plugin conflict not an issue at the Theme level and according to the Envato Policy we don’t provide Support for the third party Plugin related issues. You will need to contact the respective Plugin Support in this regard. They will guide you better.
Hope you can understand our limitations in this regard.
Best Regards