I decided to make each shape in my task flow a master item so I could just overwrite the text on them and when, for any reason, I needed to change the style, I’d do it just once - hell, this is pretty much the most advantageous thing about symbols (which I guess masters is trying to mimic here).
But when I convert those shape into masters, the connector lines don’t recognise the connecting ends of the shape, which is mildly infuriating. In order to make this work, I have to break away the masters which defeats the purpose. Can we have connectors recognising objects that are masters, please?