I have a symbol in Sketch, that consists of an image area and a text box.
The text box overrides fine using Craft, but the image area will not.
Previously using the same Sketch file, I'd click an Unsplash category and I'd receive a prompt asking which asset I wanted to fill with the symbol.
If I create a new stand alone shape, that is not part of a symbol, the image override works fine.
I'm using OSX 10.13.6, Sketch V52 and have updated and restarted the craft plugin this morning.