After adding a combined gesture to a view, a TextField inside the view would no longer respond when I would tap into it to change the text. I discovered this after adding a custom combined gesture - where I used a long press to start things before dragging. (Note: things still worked if just a drag gesture was added. Not sure what is particularly different between these two cases.)
The combined gesture:
let combined = longPressGesture.simultaneously(with: dragGesture)
The gesture was added to the view with:
.gesture(combined)