There is a bug in syncing the links with Craft from Sketch to Invision.
FIrst time when artboards are synced to Invision hotspots are also synced correctly but when any artboard is edited again in Sketch and resynced to Invision all or most of the hotspots are gone. Smallest change in text etc. results in losing the hotspots.
sketch ver 57.1
craft ver: 1.0.86
macOs High Sierra ver 10.13.6
macbook Pro Retina, Early 2015
procesor 2.7GHz Intel Core i5
Memory 8GB 1867 MHz DDR3
Graphic Intel iris Graphics 6100 1536MB