The article mentions the photon sphere, but is there any source on "orbit multiple times before escaping"? My experience is just in Kerbal Space Program, which

The article mentions the photon sphere, but is there any source on "orbit multiple times before escaping"? My experience is just in Kerbal Space Program, which is a 2-body approximation, but afaik once you are in orbit, you can't escape without changing your velocity. Also, 180 degrees is the exclusive limit of a gravity bend; less than 180 is not an orbit, but as soon as you reach 180 degree bend, it becomes an orbit. Of course, with 3-body things get much more complicated. For a third body to pull photons out of a photo sphere, fascinating and I can imagine it happening, but I haven't seen any sources along these lines.