Advanced search returns wrong results.

[incoherencer]

As the title says, sometimes when using the advanced search it will return at most 1 page of results only, the search options will not show the "all demographics" option for the demographic select box, and the "all languages" option will be unavailable too. From what I can tell, the error happens because the search form sometimes turns on a hidden "demo" option itself, the resulting search url turns to this: "https://mangadex.org/?page=search&demo=1&source_lang=2&genres=29" if you for example were looking for shonen manga.

The error seems to happen at random, but when it happens the only way to search correctly again is loading the advanced search again from the search button, or deleting the "&demo=1" part of the url