Flash of content while "waiting" for redirecting for non auth users

I know this is caused by client side rendering, so the redirects are actualy client side too. Would it be possible to “cheat” this with a simple hack? Has anyone found out someting? For Example when I try to access user dashboard, it flashes for a while before it gets redirected to login (if the user is not authenticated)

So basically what you gotta do is, do not use redirects to handle authenticated restrictions, use the settings in Pages → Select a page → Click on the Gear Icon → Private Access, here you can set up the access to logged in users only. Or in case you have the required plan, you can set this up through User Groups.