For my website https://camstore.ro/
If you can see there are some space on the left side and rhite side.
That's visible evry time. If i am log in into the wp-admin that's not visible.
Please see the picture for better understend!
Please, turn off all of the plugins, refresh your cache, and check if the problem persists.
Moreover, if you use a child theme, switch to parent, and recheck it.
You have write.. it's because of cache plugin!
So it's solved..:)