Countdown widget gets stuck when all reach zero

Usually when countdowns reach zero, they start counting the other way (e.g. 2 hours ago…), however when all 4 countdowns on the widget reach zero, they all stop counting backwards.

See attached photos in Help Scout. At 13:40, the green check should read 2 hours ago, instead it reads 0 mins

https://secure.helpscout.net/conversation/3089390591/24073?viewId=1623662