It appears that the bitter cold weather in Canada may be affecting the operation of the braking system in the Nissan LEAF.
Per the Detroit News:
"Canadian regulators opened an investigation Wednesday into brake system malfunctions in Nissan Leaf electric vehicles in severe cold weather."
The investigation includes 2013-2015 Model Year LEAFs.
This is not the first time a possible braking system issue related to the LEAF has surfaced. Several owner complaints have been filed with the NHTSA (click complaints and search for service brakes), though none appear to be linked to cold weather.
Source: Detroit News, hat tip to George K!