Home page is not display itself properly

Hello people,

I have this issue since – always. Very often my home page header isn’t display itself properly. It looks to me like some problem with cache. Here you can see what exactly I’m talking about:

https://s4.postimg.io/8uf52dzd9/page_display.jpg

This is how the header looks like. Below you can see an example on the other page how it should look.

Sometimes it looks ok, sometimes not. When I log into my wp-admin and view the home page, it displays properly only when I see the admin tools at the top bar. Sometimes I don’t see it, so that’s why I suspect some cache issue. Sometimes it helps to clear my browser cache, and sometimes not. Sometimes, sometimes… ??

This is the temporal address of my website:
serwer1623901.home.pl/autoinstalator/wordpress/

Any clue…?