Saw this on The Paceline just now:
The topic is nominally about e-bike systems, but applies (I think) to non-assist systems like DIVVY as well. The saving grace might only be that speeds are lower.
Moral of the story: If you get a DIVVY bike with grabby brake, dock it and hit the wrench button.
More on the issue:
Link was broken- let's see if this fixes it:
I think this one is working...