After further experimentation, I discovered that this issue only occurs under certain multimonitor configurations; specifically, in the case of two side-by-side monitors, if the right display's top edge is higher than the left display's top edge. If the right monitor's top edge is aligned with or blow the left monitor's top edge, the window renders correctly.
After further experimentation, I discovered that this issue only occurs under certain multimonitor configurations; specifically, in the case of two side-by-side monitors, if the right display's top edge is higher than the left display's top edge. If the right monitor's top edge is aligned with or blow the left monitor's top edge, the window renders correctly.