We have used Craft to sync our Invision project with a Sketch file. All of the symbols in our Sketch file have been made exportable, but they do not come across as downloadable assets in Invision. This appears to be true for vector and raster symbols.
An Invision support rep had us copy all of the artwork and symbols to a new Sketch file claiming this would resolve the problem, but it has not. Response times from support have been very long, so we figured we'd ask here to see if anyone else has dealt with this.
Thanks in advance for your thoughts.