The full moon occurs at the halfway point of the lunar cycle (which according to halacha is on average 29 days, 12 hours and 793 chalakim, see here). The Shulchan Aruch (OC 426:3) says one can say Kiddush Levana until but not including 16 days from the Molad (the new moon, the start of the lunar cycle). The Rema says it can be said until the halfway point of the lunar cycle mentioned above, since at that point the moon is full and begins to wane (on a side point the Aruch Hashulchan says the SA agrees he just didn't bother writing precisely). This Rema is based on Teshuvos Maharil # 19.
My question is as follows. The continuation of that teshuva mentions that if a Lunar Eclipse occurs before this cut off time, then one can no longer say Kiddush Levana. This is because a Lunar Eclipse only occurs when the moon is full. One therefore cannot say Kiddush Levana even if the halfway point of the above cycle hasn't occured. This can happen since it's only an average.
The Beis Yosef quotes this part of the teshuva, but he doesn't bring it down in the SA. The Rema doesn't mention it, nor the Mishnah Berurah or Aruch Hashulchan. Is there anyone who rules in accordance with this teshuva? It logically makes sense to me, and I find it curious none one (I know of) says it should be followed.