Here's an image of the final top layer.
Also, based on some other questions in the forum where the target printer was non UM, I tried targeting an UM S5 and got the same result.
FWIW, this is targeting a Creality Ender-3.
So, in this image, I would expect to see a red layer atop the main cylinder, as well as across the rectangular tab.
But both parts are left as raw wall or infill.