site title/navbar won't hide on project pages when scrolling

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So im pretty junior in this, but i have the same issue on 2 webpages. The site tittle won't hide on scrolling, but only at project pages. With normal pages works properly. What did i wrong :D Any suggestions ?

normal page preslavmarinov.com
project page preslavmarinov.com/lomodus/

normal page beateneumann.com
project page beateneumann.com/stein/
I did not copy the pages.
best regards
3.14

Hi 3.14!

Did you have a look here?

You can actually tell the navigation or also the logo to hide when you start scrolling. You can do this for both. Home page and projects pages.

Let me know if you need more help.

Best!

Marius

So i tried and don't work properly for me and i don't get why. even when i play with the custuomize there it is still different for pages an projects
when i put the both (menu and site tittle) fixed and hide at scrolling, they turn the positions - won't hide some(not so long scroll pages) normal pages and work for projects :D
here work at pages beateneumann.com/vita/
and here not for projects, it's like fixed beateneumann.com/stein/

thanks
∏

I got it :D the fullscreen slider was enabled for all the projects...

Ah! There we go :-) Yes. It can be the small things…