Its happening for me too…I think its broken
Yea I was also gonna ask the same question but didn’t had enough Karma . Any type of filtering is not working in any question (sort by runtime, memory, result or language).
Ideally you should send an email to firstname.lastname@example.org for speedier resolution of these bugs.
I would suggest to add filtering on the basis of point also. Like 30, 70 and 100 points whichever is applicable for the problem.