I can’t seem to find “top offset” in the settings (or documentation). For the row component, I can see “EdgeOffsets” and when I set that to 0px rather than blank, the problem persists.
I have a work-around solution where I set the colour of my second (bigger) row to what I was using as my screen background colour - and then set my screen background colour to the same as my top row. This removes the top stripe but leaves the components within my top row no longer centred vertically.
I’ve tried to make another screen altogether within my drawer navigator, and now the problem has gone. For the life of me I can’t see why there is a difference between this one and the previous one.
I suspect the problem was layers of components within components: image inside a button inside a row, inside row, inside screen, inside Drawer navigator…and I resized one of these components incorrectly which threw the whole thing out.