OK, I just don't know if this is a bug or its the way it should work, so before new issue let see if somebody knows.
In Vanadium settings => Site settings there is a Jit allow/block toggle, which is blocked by default. Then in Vanadium settings => Site settings => Data stored there a list of sites that store something in vanadium with volume of stored data next to each. Clicking on any site from that list opens a stack of 3 togglable features, Jit Ads and Sound, some sites don't have the sound toggle though. So meanwhile Jit is blocked Vanadium-wide, allowing it in the site specific menu mentioned above doesn't save, as if I leave that menu and come right back the Jit is toggled back to blocked. This seems incorrect to me, can someone explain what is this happening please?
By the way, even though Jit toggle doesnt keep the position I put it, when I go to the Jit toggle in the Site settings it is off as I would expect it, but now there is an exception (for that site i allowed the Jit for)appeared. This last aspect causes even more confusion.
I got into these setting due to some sites not working right, as someone here suggested to try the Jit if it may fix the site. Well in my case any configuration of Jit is not helping.