I use content ratings with “+” like 0+, 6+, 12+, 18+. And movies can’t be filtered with these ratings. I select the library, “all” selector, content rating - and some with plus character. And empty list is displayed. Correct movies are displayed only with custom filter and in another clients (checked PMP, iOS etc). Also, ratings without plus are displayed correctly too e.g. 0, 6,12,18. I suppose not only the content rating is affected, but I have no plus characters in other fields.