so, if you use the "Show" button to see your site while using the editor, it might happen that the editor experiences random lags and freezes, and the same behaviour can occur in the site too.
I suggest you to use the direct link to your site instead of the Show button. The only difference is that you'll need to refresh the site manually to see the changes you make in the editor. Apart from that, everything else should work normally... and hopefully without freezes
Let me know if this solves your issue. In the meantime, we'll work on making the "Show" button to behave better.