Hello, @Blade,
1- Alright, Sure you can check all the possibilities before contacting your hosting provider.
2- I understood totally, Once the server response time will be better this DOM issue will be resolved automatically.
3- In the speed optimization wizard there is an option for lazy see image: https://postimg.cc/HJPMR4K1 second, the thing is when you set a widget/element for products you will see the lazy option in the settings of the widget/element see image: https://postimg.cc/MvFnmbnC
Regards 8Themes Team.