This may be a new thing (I haven’t noticed it until the last couple of TestFlight builds) but on a transaction screen, scrolling doesn’t work if the touch starts over the category button, “Add Note” button or “Add Receipt” button.
This is particularly noticeable as these buttons are placed in a natural position for the start of a swipe-up type gesture (at least on an iPhone 6).
Expected behaviour would be that of the “Something Wrong?” button, where scrolling works even if the touch event starts on the button.