Your likely encountering something called gimble lock from the make rotator node. that node is designed to generate a new rotation based off 3 separate rotations. by trying to use your current relative rotation and adding, once you align to a plane (in this case when your clock points up) it will get stuck and spin.
just use the delta rotation directly and add a flat amount every so many ticks/seconds. heres my quick example setup that rotates a collision sphere with a child cube that will then rotate around the sphere (because its rotating).
