+1
Maybe I'm just not getting it, since it seems like one of the main reasons to even create a symbol.
I have multiple artboards, with text in one. I make that text a symbol and duplicate it for each artboard. On some artboards I change the color - for this, I disable sync, change the color, re-enable sync. When I now change the font of one symbol instance, only that symbol instances' font is changed.
What I'd expect is that all the fonts change - i.e. that text color and font are independent attributes. I'm assuming this is the issue here, that the text color is desynchronized and for some reason also the font.