This independent review site earns affiliate commission (at no cost to you) when provided links are used to make any purchase
Nikon Releases KeyMission 170 Firmware v.1.2
From Nikon:
Changes from Firmware Version 1.1 to 1.2
Made improvements regarding an issue which resulted in connections between the camera and iOS 10.2-compatible versions of the SnapBridge 360/170 app becoming unstable.
Note: Users of iOS 10.2 will also need to upgrade the SnapBridge 360/170 app to the latest version, which supports iOS 10.2.