Contact me and tell me what is happening with your business because of our plugin update. I will make a hotfix together with your help (at least tell me how to reproduce this problem locally, provide testing info or something).
The problem with margins/padding is somehow related to the Group block. In some installations, it works as expected (in all our sites and most user’s sites). In some cases, it stops working only with the installed Gutenberg plugin because they are changing many things every time, and we have to test and fix compatibility. In some cases, like yours, it stops working even without the Gutenberg plugin (right?). And I never get a reproduction guide for your case.
You are right. If you have this bug and click Publish, the page will be published without paddings and margins. This is a strange conflict, and you can check it – add margin/padding, click Publish – everything will be fine in the editor and on the front end. Then reload the editor; no margin/padding will be available on blocks, but it is still there on the front end. If you don’t click on Publish, it will be fixed with the next Ghost Kit update.
If you see this bug and use Gutenberg, we know about it. This is something related to their latest changes. They broke all our plugins with it, and we will fix it. But if you don’t use Gutenberg, provide me some info so I can reproduce it…