Mine has a minor donut hole at extremely close distances but it is gone at 4-5 inches. It is normal for lights to have this at close distances, it has not affected the usage of my rotary or my other lights.
Well I am pretty sure that anyone who actually has a Rotary knows that its fairly common. Or anyone who owns an XPG light understands this phenomenon. My E1B has it, my E1L has it, my M61, M61L, M61 hi cri, Quark Turbo, etc.... All of my XPG lights have it. Visual proof not necessary. If you know what you are talking about.