I have the same problem. BT controls haven't been working for a while now. Blocked sites are accessible. Also when I try to delete things like filter times and blocked websites, the changes are not saved. Not sure what's going on but given it seems this problem is not unique it might be worth posting a public solution to the problem.
Thanks for posting. I'm sorry you're having problems with the parental controls. I can look into this for you if you wish. I’ve dropped you a private message with details on how to contact the Moderator team.