Public List Is Actually Private

​This list is set to public, but when accessed while logged out, it is private.​
​https://www.imdb.com/list/ls562168394/​
​At the following URL, the list is correctly shown to be public:​
​https://www.imdb.com/user/ur160919585/lists​

​But when actually accessing the list, you are told that the list is private.​

​I have tried creating an identical list, but the same issue occurred. Other unrelated lists function correctly.​