Brave looses website settings after unspecified amount of time

Hi there,

I really like the Brave Browser but there is a bug which is driving me nuts. As you know there are a lot of websites which have special settings - e.g. Language settings, Dark Mode, etc. - I really like those settings, especially the dark mode on youtube etc.
But after a unspecified period of time Brave forgets those settings. So I go to a website and instead of activating my chosen settings (dark mode) - the website is shown in its default configuration.

Is there any solution for this problem? As far as I remember, a few months ago I got a similar problem with Chrome Browser. But I can’t remember how I fixed it.

Thanks in advance.

No solution for this problem? Has nobody any idea?