Content rating filter not working

[koinsj]

I unticked all the content rating filter options then started sniffing and searched for some random stuff, the url was like this: https://api.mangadex.org/manga?title=Random&limit=10&offset=0&contentRating%5B%5D=safe&contentRating%5B%5D=suggestive&contentRating%5B%5D=erotica&includes%5B%5D=cover_art&includes%5B%5D=author&order%5Brelevance%5D=desc

Then I only ticked the safe option and did the search again, this time the url was like this: https://api.mangadex.org/manga?title=Random&limit=10&offset=0&contentRating%5B%5D=safe&contentRating%5B%5D=suggestive&contentRating%5B%5D=erotica&includes%5B%5D=cover_art&includes%5B%5D=author&order%5Brelevance%5D=desc&contentRating%5B%5D=safe

I noticed that the filter option was added to the end of the url, but other options like suggestive and erotica were still present in the url. I guess that’s why I could still see those results even if I only ticked the safe option.

Sorry if my English is a bit poor.