Off and on, we've had issues where 1 card has frozen up on one of our team members computers. Everyone else can access that card and add to it but the one person is not able to. Also, that person can access and add to other cards. It's just the one card that we have issues with (the card that has issues changes and the person who can't access it changes as well) while everything else works fine. We shut down and restart Trello and we reboot the computer but it doesn't seem to help. After a period of time, it will start working again. Has anyone else had this issue?